1.8: Photosynthesis

Photosynthesis

6CO2 + H2O + energy yields C6H12O6 + 6O2

c. The Sun

Based on the cycle of photosynthesis and cellular respiration, one can say that the ultimate source of energy for all living things on Earth is a. Carbonydrates b. Water c. The Sun d. Carbon dioxide

Photosynthesis

In what process is light (radiant) energy from the Sun converted into chemical energy stored in food molecules?

The light dependent reactions

In which part of photosynthesis are chlorophyll molecules directly involved?

Light dependent reaction

Light is used to split water molecules and produce ATP

a. Glucose

Photosynthesis converts light energy to stored chemical energy. What form of chemical energy is used in cellular respiration? a. Glucose b. Oxygen c. Chlorophyll d. Carbon

c. Glucose levels in the cells would drop to near zero

Researchers developed a chemical that they hypothesize will disrupt enzyme function in chloroplasts, making the chloroplasts effectively nonfunctional. The researchers plan to apply the chemical to a group of plant cells in a special cell culture. What would serve as the best and most immediate evidence that the researchers' hypothesis about this chemical is correct? a. Amino acid levels in the cells would drop to near zero b. Carbon dioxide levels in the cells would drop to near zero c. Glucose levels in the cells would drop to near zero d. Phospholipid levels in the cells would drop to near zero

Light independent reaction

Second phase of photosynthesis

Granum

Stack of thylakoids in a chloroplast

The Calvin Cycle

The light independent reactions are known by what other name?

d. Oxygen

The major atmospheric byproduct of photosynthesis is a. Nitrogen b. Carbon dioxide c. Water d. Oxygen

d. Chlorophyll

The pigment involved in photosynthesis is a. ATP b. Chlorine c. Chloroplast d. Chlorophyll

Light (radiant) energy

What energy is required for photosynthesis?

6CO2 + 6H2O + light energy yields C6H12O6 + 6O2

What is the equation for photosynthesis?

The products of one are the reactants of the other

What is the relationship between the reactants and products of cellular respiration and photosynthesis?

The splitting of a molecule of water

What is the source of oxygen released by plants in photosynthesis?

b. Photosynthesis

Which cellular process converts solar energy into chemical energy? a. Chemosynthesis b. Photosynthesis c. Respiration d. Transpiration

a. Solar to chemical

Which energy conversion occurs during photosynthesis? a. Solar to chemical b. Chemical to solar c. Solar to mechanical d. Mechanical to chemical

B. Chlorophyll & Sunlight

6CO2 + 6H2O yields C6H12O6 + 6O2 What other requirements are necessary for this reaction to occur? A. Chlorophyll & Nitrogen B. Chlorophyll & Sunlight C. Sunlight & Ethanol D. Sunlight & Nitrogen

a. The amount of oxygen in the atmosphere would decrease

A massive toxic spill kills off half the population of photosynthetic plankton in the ocean. What do you predict may happen to the atmosphere as a result of this event? a. The amount of oxygen in the atmosphere would decrease b. The amount of oxygen in the atmosphere would increase c. The amount of carbon dioxide in the atmosphere would decrease d. There would be no change

B. Photosystem II is damaged

A plant cell undergoing photosynthesis can no longer release oxygen from its leaves. Which of the following best explains what is wrong with the plant? a. It no longer contains chlorophyll b. Photosystem II is damaged c. The stroma is not taking in CO2 d. Electron carrier molecules are not passing electrons

d. sugars

A plant exposed to light with a wavelength of about 430 nm will produce which substance more quickly than a plant of the same size and species exposed to equally bright light with a wavelength of about 550 nm? a. carbon dioxide b. lipids c. nitrogen d. sugars

b. The plant no longer has chlorophyll to capture energy for photosynthesis

A plant has turned brown and is no longer able to photosynthesize. What has caused this to happen to the plant? a. The sun no longer provides the plant with solar energy b. The plant no longer has chlorophyll to capture energy for photosynthesis c. The plant is no longer able to absorb oxygen from the atmosphere d. The plant's light-dependent reaction can no longer produce ATP

a. Die from a lack of food

A plant kept in the dark would a. Die from a lack of food b. Perform the light independent reactions only c. Recycle materials but not energy d. Conduct photosynthesis but not cellular respiration

A. The oxygen molecules in sugars created by photosynthesis come from carbon dioxide

A researcher studying the process of photosynthesis used water with molecules that contain heavy isotopes of oxygen, 18O, to water a plant. The researcher traced the transfer of 18O into other substances and found that the heavy atom of oxygen was found only in the oxygen gas released. She concluded that the oxygen molecules in oxygen gas released during photosynthesis come from water taken in by the plant. Which alternative conclusion can be drawn from the experiment? A. The oxygen molecules in sugars created by photosynthesis come from carbon dioxide B. The oxygen molecules in sugars created by photosynthesis come from water C. The oxygen molecules in oxygen gas created by photosynthesis come from sugar D. The oxygen molecules in oxygen gas created by photosynthesis come from carbon dioxide

a. This is a plant cell that was found in a leaf

A scientist observing a cell under a microscope observes that the cell has many organelles, is surrounded by a cell wall, and produces oxygen. What prediction can be made about this cell? a. This is a plant cell that was found in a leaf b. This is a plant cell that was found in a root c. This is an animal cell that was found in blood d. This is an animal cell that was found in muscle

d. The light-dependent reactions function best with blue light

A student conducts an experiment in which a water plant is exposed to various color of light. With each color of light, the student monitors the rate of photosynthesis by counting the number of oxygen bubbles produced by the plant. The graph (on the answer side) shows the results of the experiment. What can be inferred from the results of the experiment? a. The Calvin cycle functions best with green light b. The Calvin cycle functions best with blue light c. The light-dependent reactions function best with green light d. The light-dependent reactions function best with blue light

b. How will temperature affect the rate of photosynthesis

A student conducts an experiment that focuses on photosynthesis in plants using solutions made from ground-up spinach leaves. One solution is incubated at 30 degrees celsius, the second solution is incubated at 15 degrees Celsius, and the third solution is incubated at 45 degrees Celsius. Based on the materials the student uses, which question is the experiment designed to answer? a. How will temperature affect the amount of water released during photosynthesis b. How will temperature affect the rate of photosynthesis c. How will temperature affect the amount of oxygen used during photosynthesis d. How will temperature affect the amount of carbon dioxide released during photosynthesis

c. Dissolved oxygen meter

A student is planning an experiment in which she will study how the color of light affects photosynthesis in algae. To do this, she will measure the amount of oxygen produced by the algae. Which would be the BEST tool for the student to use to make the measurements she needs? a. Digital thermometer b. pH meter c. Dissolved oxygen meter d. Spectrograph

A. It will slow down with decreasing light intensity

As light intensity slowly decreases in a forest, what will most likely happen to the rate of photosynthesis? A. It will slow down with decreasing light intensity B. It will continue to happen at a normal pace C. It will speed up with decreasing light intensity D. It will stop with decreasing light intensity

Calvin cycle

Biochemical pathway of photosynthesis in which carbon dioxide is converted into glucose using ATP

D. Photosynthesis

By what process do organisms that contain chlorophyll use solar energy to convert carbon dioxide and water into compounds containing chemical energy? A. Aerobic respiration B. Anaerobic respiration C. Glycolysis D. Photosynthesis

a. Cellular respiration

Carbon monoxide is a gas that has one carbon atom bonded with one oxygen atom (CO). When inhaled, carbon monoxide is deadly because it prevents red blood cells from carrying oxygen to other cells in the body. Without oxygen, cells cannot undergo a. Cellular respiration b. Photosynthesis c. DNA replication d. Passive transport

a. Chloroplast

Cellular respiration is to the mitochondria as photosynthesis is to the a. Chloroplast b. Golgi apparatus c. Cytoplasm d. Vacuole

d. Molecular oxygen is a reactant in photosynthesis and is a product of respiration

Consider the reactions shown below. Which of the following statements is NOT TRUE concerning these reactions? 6CO2 + 6H2O + light energy yields C6H12O6 + 6O2 C6H12O6 + 6O2 yields 6CO2 + 6H2O + energy a. Photosynthesis converts solar energy into a chemical energy source b. Respiration can be described as the oxidation of organic material c. Photosynthesis is an endothermic reaction, and respiration is an exothermic reaction d. Molecular oxygen is a reactant in photosynthesis and is a product of respiration

As organisms carry out cellular respiration, carbon dioxide is released, and that carbon dioxide is used for photosynthesis

Describe the cycling of carbon dioxide in photosynthesis and cellular respiration.

Light (radiant) energy from the Sun is converted into chemical energy stored in food molecules

Describe the energy conversion that occurs in photosynthesis.

b. Carbon dioxide

During cellular respiration, a series of chemical reactions produces which of the following molecules as a waste product? a. Proteins b. Carbon dioxide c. ATP d. Oxygen

a. only used in the light-independent reaction

During photosynthesis, carbon dioxide is a. only used in the light-independent reaction b. absorbed from the soil c. broken down into small carbon compounds d. all of the above

c. Oxygen

During the light-dependent reactions of photosynthesis, solar energy splits water molecules, which results in the release of a waste product. Which molecule is released as a waste product? a. Glucose b. Hydrogen c. Oxygen d. Starch

b. Oxygen

During the process of photosynthesis, light energy is used to synthesize glucose molecules. Which product from this process is used to convert the glucose to energy during cellular respiration? a. Water b. Oxygen c. Nitrogen d. Carbon dioxide

C. Light dependent

During which stage of photosynthesis is oxygen produced? A. Calvin cycle B. Electron chain C. Light dependent D. Light independent

Light dependent reaction

First phase of photosynthesis

Chlorophyll

Green pigment present in most plant cells, gives plants their green color, and reacts with sunlight, carbon dioxide and water to form carbohydrates

Chlorophyll

Green pigment that absorbs light during photosynthesis

C. produce carbon dioxide gas for photosynthesis

Heterotrophs depend on autotrophs for chemical energy in a food chain. Which statement describes how autotrophs depend on heterotrophs for survival? A. supply oxygen for aerobic respiration B. provide sunlight for photosynthesis C. produce carbon dioxide gas for photosynthesis D. make lactic acid during anaerobic respiration

D. ATP molecules provide energy for the synthesis of carbohydrates

How are ATP molecules important in plants? A. ATP molecules increase the rate of carbohydrate formation B. ATP molecules serve as the basic building blocks of all plant structures C. ATP molecules release heat to warm internal plant structures D. ATP molecules provide energy for the synthesis of carbohydrates

a. Both processes use carbon, hydrogen, and oxygen

How are photosynthesis and cellular respiration similar? a. Both processes use carbon, hydrogen and oxygen b. Both processes produce oxygen c. Both processes produce glucose d. Both processes use water, sunlight, and nitrogen

c. Photosynthesis produces glucose which is used in cellular respiration to produce energy

How can the relationship between photosynthesis & cellular respiration BEST be described? a. Cellular respiration produces oxygen that is used by photosynthesis b. Carbon dioxide is produced by photosynthesis and used in cellular respiration c. Photosynthesis produces glucose which is used in cellular respiration to produce energy d. Cellular respiration stores energy for future use by cells and photosynthesis releases energy for use in cellular reactions

B. The Calvin cycle takes place in the stroma

How does the Calvin cycle (light-independent reactions) differ from the light-dependent reactions of photosynthesis? A. The Calvin cycle requires light energy B. The Calvin cycle takes place in the stroma C. The Calvin cycle produces ATP and NADPH D. The Calvin cycle is the first stage of photosynthesis

The atoms of carbon, oxygen, and hydrogen are continually rearranged in these processes

In the cycles of photosynthesis and cellular respiration how is matter recycled?

a. hydrogen

In the first stage of photosynthesis, ______ molecules accumulate to form a gradient in the thylakoid. a. hydrogen b. nitrogen c. oxygen d. carbon

a. It is released into the environment

In the first stage of photosynthesis, solar energy breaks down water molecules to produce oxygen. What happens to the oxygen produced? a. It is released into the environment b. It is used to synthesize ATP and NADPH molecules c. It is stored in cells and is later used to form carbon dioxide d. It is used to convert water and carbon dioxide into glucose molecules

c. sunlight is required to generate ATP

In the first step of photosynthesis, a. carbon compounds are produced b. the Calvin cycle takes place c. sunlight is required to generate ATP d. carbon dioxide is utilized

d. water and c. oxygen

In the light-dependent reactions of photosynthesis, ______ is a reactant, and ______ is a product. a. carbon dioxide b. glucose c. oxygen d. water

A. ATP and NADPH

In the process of photosynthesis, the light-dependent reactions produce energy storing compounds that are used during the dark reactions. What are these energy storing compounds? A. ATP and NADPH B. Carbon dioxide and Glucose C. Glucose and ATP D. NADPH and Glucose

Chloroplast

In what cellular organelle does photosynthesis occur?

Light dependent reactions

In what part of photosynthesis is water split and oxygen released?

Photosynthesis

In what process does carbon fixation occur?

Light dependent reactions

Initial reactions in photosynthesis, which are triggered by the absorption of light by photosystems I and II and include the passage of electrons along the electron transport chains, the production of NADPH and oxygen gas and the synthesis of ATP through chemiosmosis

Thylakoid

Membrane system found within chloroplasts that contains the components for photosynthesis

Autotroph

Organism that produces its own nutrients from inorganic substances or from the environment instead of consuming other organisms

d. Use energy from sunlight to produce the plant's own food

Plants are called producers because they have chloroplasts that a. Release energy from sugars b. Produce heat needed to keep the plant warm c. Use oxygen to make water d. Use energy from sunlight to produce the plant's own food

d. all of the above

Plants use CO2 and water to produce a. sugars b. carbohydrates c. glucose d. all of the above

Stroma

Solution that surrounds the thylakoids in a chloroplast

D. the breakdown of sugars

Study the diagram (on the answer side). Which of these processes provides energy that is used most directly to make ATP? A. the storage of sugars B. the transport of sugars C. the synthesis of sugars D. the breakdown of sugars

Pigment

Substance that gives another substance or mixture its color

c. The Calvin cycle

Suppose a plant is placed in a pure oxygen atmosphere. Which stage of photosynthesis will this affect? a. The production of NADPH b. The production of ATP c. The Calvin cycle d. The electron transport chain

C. Respiration

The solar energy necessary for photosynthesis is converted to chemical energy and released for the cell's use by which process? A. Radiation B. Distillation C. Respiration D. Transpiration

b. Water

The source of oxygen produced during photosynthesis is a. Carbon dioxide b. Water c. The air d. Glucose

a. It increases the surface area for photosynthesis

The structure of a chloroplast consists of thylakoid sacs that are stacked together one over the other. How does the arrangement of the thylakoids help the chloroplast? a. It increases the surface area for photosynthesis b. It prevents sunlight from escaping the chloroplast c. It allows energy molecules to be formed quickly d. It stores the glucose formed during photosynthesis

Light dependent and Light independent reactions

What are the two types of reactions that that occur in photosynthesis?

It releases the energy that was stored during photosynthesis

What does cellular respiration do in conjunction with photosynthesis to benefit living things?

Photosynthesis

What does the equation 6CO2 + 6H2O + light energy yields C6H12O6 + 6O2 represent?

Made by light

What does the word "photosynthesis" mean?

D. oxygen

What is the main product of the light-dependent reactions of photosynthesis? A. carbon dioxide B. energy C. glucose D. oxygen

d. Water

Which of the following is a reactant of photosynthesis? a. Oxygen b. Carbohydrate c. Glucose d. Water

c. Photosynthesis

Which process decreases the amount of carbon in the atmosphere while increasing the amount of food for animals in the ecosystem? a. Combustion b. Decomposition c. Photosynthesis d. Respiration

A. They require solar energy and produce energy storing molecules

Which statement BEST describes the light-dependent reactions of photosynthesis? A. They require solar energy and produce energy storing molecules B. They require solar energy and produce oxygen as the main product C. They require solar energy and produce simple sugars from carbon dioxide D. They require solar energy and produce carbon dioxide as the main product

D. Carbon dioxide is used to form simple sugars

Which step is a part of the dark (light-independent) reactions? A. ATP molecules are produced B. Solar energy is absorbed by chloroplasts C. Oxygen is released when water molecules are split D. Carbon dioxide is used to form simple sugars

c. An increase in photosynthesis

Which will lead to a decrease in carbon dioxide concentrations in the atmosphere? a. An increase in the decay of organic matter b. An increase in cellular respiration c. An increase in photosynthesis d. An increase in burning fossil fuels

Energy does not cycle through Earth's systems, and a lot of it is lost as heat which cannot be recaptured

Why does life on Earth depend on the continuous input of light energy from the Sun?

B. Only respiration occurred because the plant was in the dark

A scientist places a plant in an enclosed system. After 5 days, she determines that the amount of carbon dioxide has increased and the amount to oxygen has decreased. How can her findings be explained? A. Only photosynthesis occurred because the plant was in direct sunlight B. Only respiration occurred because the plant was in the dark C. Only anaerobic respiration occurred because the plant was in the dark D. Only glycolysis occurred because the plant was in direct sunlight

d. Plants require light to produce sugars and starches

A student conducts an experiment to test the changes a plant undergoes as it is exposed to light. The student uses two identical, healthy bean plants with the same baseline nutrient amount. One plant is exposed to 10 hours of sunlight daily, while the other plant is kept in darkness for 10 days. The student uses indicators to test for the amounts of sugar and starch in the leaves at the start of the experiment, after 5 days, and then at the end of 10 days. The data table shows the experimental results. (See the table on the answer side). Which statement represents a valid conclusion based on the experimental results? a. Plants to not require light to produce sugars and starches b. Plants do not require light to produce starches, but sugar production requires light c. Plants require light to produce starches, but sugar production does not require light d. Plants require light to produce sugars and starches

A. Plants also produce some carbon dioxide during aerobic cellular respiration, which will limit the device's ability to measure the rate of photosynthesis accurately

A team of biologists built a device designed to measure the rate of photosynthesis by measuring the change in the carbon dioxide concentration of a plant. The device encloses a tomato plant growing in a clay pot. Once sealed, the plant can be watered automatically and the temperature held constant without allowing any outside air into the device. The biologists hypothesize that their device will track the photosynthetic rate accurately because all the carbon dioxide will be used up steadily in the device until no more is left since no outside air can enter the device. What problem is being overlooked based upon the biologists' design and hypothesis? A. Plants also produce some carbon dioxide during aerobic cellular respiration, which will limit the device's ability to measure the rate of photosynthesis accurately B. Plants produce excess carbon dioxide during the process of photosynthesis, so the concentration of this gas will hold relatively steady, preventing an accurate measurement of photosynthetic rate C. Plants release relatively large amounts of carbon dioxide gas through the process of transpiration, which will keep the carbon dioxide concentration artificially high in the device D. Plants will decompose glucose sugar into carbon dioxide and water when CO2 concentrations are low in the atmosphere, leading to inaccurate estimates of the rate of photosynthesis

Chloroplast

Organelle containing chlorophyll & other pigments

Chloroplast

Organelle found in plant and algae cells where photosynthesis occurs

Chloroplast

Organelle that is the site of photosynthesis

b. Photosynthesis produces glucose that the cell uses for cellular respiration

Photosynthesis & cellular respiration occur within a plant cell. How are energy transformations in these two processes related? a. Cellular respiration traps solar energy for use in photosynthesis b. Photosynthesis produces glucose that the cell uses for cellular respiration c. Photosynthesis transfers solar energy to cellular respiration for glucose production d. Cellular respiration occurs only during daylight and stores energy to allow photosynthesis to occur at night

a. Photosynthesis would decrease and cellular respiration would decrease

Photosynthesis and cellular respiration are both metabolic processes that share some common features. The relationship between them is shown. How could these be affected if the amount of light were decreased? a. Photosynthesis would decrease and cellular respiration would decrease b. Photosynthesis would increase and cellular respiration would not change c. Cellular respiration would increase and photosynthesis would increase d. Cellular respiration would decrease and photosynthesis would not change

c. Chloroplast

Photosynthesis occurs in which cell organelle? a. Ribosome b. Mitochondria c. Chloroplast d. Nucleus

d. The products of photosynthesis are the reactants of respiration

Plants and animals exchange materials through the processes of photosynthesis and respiration. Which statement is true about the way these two processes are related? a. The products of photosynthesis inhibit respiration b. The products of photosynthesis are also the products of respiration c. The reactants of photosynthesis are also the reactants of respiration d. The products of photosynthesis are the reactants of respiration

c. Respiration

Plants produce oxygen which is used by fungi, animals and plants. In what process do these organisms use oxygen? a. Mitosis b. Replication c. Respiration d. Photosynthesis

Photosynthesis

Process by which plants, algae and some bacteria use the energy of sunlight, carbon dioxide and water to produce ATP, carbohydrates and oxygen

a. Converting energy

Removal of the mitochondria from a plant cell would prevent the cell from a. Converting energy b. Digesting food c. Carrying out photosynthesis d. Making protein

C. NADP+

Students have been studying photosynthesis in their biology class and are using a computer simulation that allows them to test the effects of several variables on the products of both the light-dependent and light-independent reactions of photosynthesis. In the simulation, they are able to increase or decrease the amounts of several compounds. Removal of what compound in the chloroplast will have the MOST negative impact on the light-dependent reactions? A. C6H12O6 B. K+ C. NADP+ D. O2

Carbon fixation

Synthesis of organic compounds from carbon dioxide

Light independent reactions

The Calvin Cycle is also known as what?

c. NADPH and ATP; sugar

The light-independent reaction uses the energy from ______ to produce ______. a. oxygen; carbon b. carbon; oxygen c. NADPH and ATP; sugar d. sugar; NADPH and ATP

b. Aerobic respiration

The chemical equation shows the reaction of glucose and oxygen. Which process does this equation represent? a. Photosynthesis b. Aerobic respiration c. Anaerobic respiration d. Nitrogen fixation

b. Sugars

The end products of photosynthesis include a. Carbon dioxide and water b. Sugars c. Carbon dioxide and oxygen d. Oxygen and water

d. O2

The light-dependent reactions of photosynthesis capture solar energy that is used to create energy-storing molecules and to split water. What is a waste product of the light-dependent reactions? a. ATP b. CO2 c. NADPH d. O2

a. It results in the release of oxygen as a waste product

The light-dependent reactions of photosynthesis involve the use of solar energy to split water molecules. What is the significance of this step in the light-dependent reactions? a. It results in the release of oxygen as a waste product b. It provides free electrons for the production of carbon dioxide c. It results in the release of energy by breaking high-energy bonds in ATP d. It forms sugars that are broken down during the light-independent reactions

b. photosynthesis

The process of converting carbon dioxide into sugars is called a. glycolysis b. photosynthesis c. cellular respiration d. oxidation

c. Photosynthesis

The process whereby plants capture energy and make complex molecules is known as a. Homeostasis b. Evolution c. Photosynthesis d. Development

A. C6H12O6 + 6O2; Chloroplast

The reactants for a biochemical reaction are 6CO2 + 6H2O. What will be the products for this reaction, and where does the reaction take place? A. C6H12O6 + 6O2; Chloroplast B. C6H12O6 + 6O2; Mitochondria C. C6H12O6 + 6CO2; Chloroplast D. C6H12O6 + 6CO2; Mitochondria

A. The light-independent reactions are dependent on the products of the light-dependent reactions which do not occur at night or under very low light conditions

There are 2 types of reactions in photosynthesis: light-dependent & light-independent. A group of biology students creates a set of devices that will automatically measure the rates of both types of reactions. The light-dependent reaction rate it tracked by the rate of water uptake in plants, & the light-independent reaction rate is tracked by the rate of carbon dioxide gas uptake in plants. The students decide to measure the rate light-dependent reactions at noon, when the light is brightest, in a sunny room. They measure the rate of the light-independent reactions at 8:00 pm in a dark room under very minimal lighting conditions. What is the most obvious critique of the students' experimental design? A. The light-independent reactions are dependent on the products of the light-dependent reactions which do not occur at night or under very low light conditions B. The light-dependent reactions do not require water but rather carbon dioxide gas that is needed for carbon fixation C. The presence of even very low light levels in the room will ensure that the light-independent reactions of photosynthesis will not happen D. The rate of the light-dependent reactions will actually be greater earlier in the morning with more indirect light and milder temperatures

d. In the stroma

Where does the light-independent reaction of photosynthesis take place? a. In the nucleus b. In the thylakoid membrane space c. In the cell wall d. In the stroma

d. Energy, H2O and CO2

Two cellular processes are shown: C6H12O6 + 6O2 yields 6CO2 + 6H2O + Energy 6CO2 + 6H2O + Energy yields C6H12O6 + 6O2 One of the equations represents respiration. During respiration, the reactants are converted into a. Energy and O2 b. C6H12O6 and O2 c. C6H12O6 and H2O d. Energy, H2O and CO2

Carbon, hydrogen, and oxygen

What are the elements involved in both photosynthesis and cellular respiration?

Oxygen and glucose

What are the end products of photosynthesis?

Glucose and Oxygen

What are the products of photosynthesis?

D. O2 & C6H12O6

What are the products of photosynthesis? A. CO2 & H2O B. CO2 & C6H12O6 C. O2 & H2O D. O2 & C6H12O6

B. Carbohydrates and a molecule essential for aerobic cellular respiration

What are the products of photosynthesis? A. Lipids and a molecule essential for lactic acid fermentation B. Carbohydrates and a molecule essential for aerobic cellular respiration C. Starches and a molecule essential for alcoholic fermentation D. Sugars and a molecule essential for anaerobic cellular respiration

Carbon dioxide, water & light energy

What are the reactants of photosynthesis?

a. Carbon dioxide (CO2) & Water (H2O)

What are the reactants of photosynthesis? a. Carbon dioxide (CO2) & Water (H2O) b. Glucose (C6H12O6) & Carbon dioxide c. Oxygen (O2) & Water d. Water & Glucose

c. Carbon dioxide (CO2) & Water (H2O)

What are the reactants of photosynthesis? a. Water (H2O) & Glucose (C6H12O6) b. Glucose (C6H12O6) & Carbon dioxide (CO2) c. Carbon dioxide (CO2) & Water (H2O) d. Oxygen (O2) & Water (H2O)

Light independent reactions/Calvin cycle

What are the reactions known as that do not require light to occur?

Cellular respiration and photosynthesis

What are the two processes in which the products of one are the reactants of the other?

Chlorophyll

What is the primary light gathering pigment in plants?

C. Glucose

What is the primary organic product of photosynthesis? A. ATP B. Chlorophyll C. Glucose D. RNA

D. It is stored as energy in the bonds of organic molecules

What is the principal role of radiant energy in the process of photosynthesis? A. It is converted into enzymes for the digestion of organic wastes B. It is converted into water which is then released through transpiration C. It is stored as energy in the bonds of inorganic molecules D. It is stored as energy in the bonds of organic molecules

c. Photosynthesis is light-energy dependent; Cellular respiration is light-energy independent

Which comparison BEST describes the difference between photosynthesis and cellular respiration? a. Cellular respiration is ATP dependent; Photosynthesis is ATP independent b. Photosynthesis is oxygen dependent; Cellular respiration is carbon dioxide dependent c. Photosynthesis is light-energy dependent; Cellular respiration is light-energy independent d. Cellular respiration is electron-transport dependent; Photosynthesis is electron-transport independent

D. The light-dependent reactions provide the ATP and NADPH necessary for the light-independent reactions, which produce carbon compounds such as glucose

What is the relationship between the light-dependent and light-independent reactions of photosynthesis? A. The light-dependent reactions produce simple carbon products that are converted to sugars, lipids, and proteins in the light-independent reactions B. The light-independent reactions produce simple carbon products that are converted to sugars, lipids, and proteins in the light-dependent reactions C. The light-independent reactions provide the ATP and NADPH necessary for the light-dependent reactions, which produce carbon compounds such as glucose D. The light-dependent reactions provide the ATP and NADPH necessary for the light-independent reactions, which produce carbon compounds such as glucose

A. It converts light energy to energy contained in chemical bonds

What is the role of chlorophyll in photosynthesis? A. It converts light energy contained in chemical bonds B. It breaks the hydrogen bonds in water molecules C. It converts water and carbon dioxide to sugar D. It provides the energy needed for the light dependent reactions

The reactions do not require light to occur

What is the significance of the name of the light independent reactions?

a. Sunlight

What is the source of energy for photosynthesis? a. Sunlight b. Carbon dioxide c. Glucose d. Water

a. ATP

What molecule is produced during both photosynthesis & cellular respiration to power chemical reactions occurring in both of these cellular events? a. ATP b. CO2 c. Glucose d. Water

b. Photosynthesis

What process is shown by the equation: 6CO2 + 6H2O yields C6H12O6 + 6O2 a. Chemiosmosis b. Photosynthesis c. Anaerobic respiration d. Aerobic respiration

Cellular respiration

What process releases the energy stored in photosynthesis?

Photosynthesis

What process stores energy in the chemical bonds of carbohydrates?

A. Both processes use ATP as an energy carrier

What statement accurately compares the chemical processes of cellular respiration and photosynthesis? A. Both processes use ATP as an energy carrier B. Both processes require water C. Both processes require light energy to form products D. Both processes are aerobic reactions only

b. provide high-energy electrons to generate NADPH

When a plant is not watered, it dies because it cannot a. power the chemical reactions for photosynthesis b. provide high-energy electrons to generate NADPH c. remove carbon dioxide from the atmosphere to form glucose d. absorb solar energy in the form of light

D. Chloroplasts capture solar energy and convert it to the ATP and NADPH that are used to make glucose molecules

Where do photosynthetic organisms get the energy needed to make glucose molecules? A. Mitochondria utilize the solar energy manufactured in the chloroplasts to make glucose molecules B. Chloroplasts utilize the solar energy manufactured in the mitochondria to make glucose molecules C. Mitochondria capture solar energy and convert it to the ATP and NADPH that are used to make glucose molecules D. Chloroplasts capture solar energy and convert it to the ATP and NADPH that are used to make glucose molecules

C. They use the ATP and NADPH that are produced during the light-independent reactions

Where do photosynthetic organisms get the energy needed to make sugars during the light-independent/dark reactions? A. They obtain the energy directly from the Sun B. They convert the 6-carbon sugars into 5-carbon sugars C. They use the ATP and NADPH that are produced during the light-independent reactions D. They use the ADP and carbon dioxide produced during the light-dependent reactions

In the chemical bonds of carbohydrates

Where does photosynthesis store energy?

c. Mitochondria - converts energy found in glucose into energy for use by the cell

Which is an organelle that performs cellular respiration and is paired with its correct function? a. Chloroplast - converts light energy into chemical energy b. Chloroplast - converts chemical energy into light energy c. Mitochondria - converts energy found in glucose into energy for use by the cell d. Mitochondria - converts cellular energy into glucose chemical energy

a. To convert energy from sunlight into the stored chemical energy of sugar

Which of the following best describes the function of photosynthesis? a. To convert energy from sunlight into the stored chemical energy of sugar b. To release energy from sugar into the atmosphere c. To produce water for plants to use in photosynthesis d. To dispose of carbon dioxide that builds up by digesting food

b. 2

Which of the structures shown below produces oxygen during photosynthesis? a. 1 b. 2 c. 3 d. 4

a. Photosynthesis

Which of these processes will increase oxygen levels in the atmosphere? a. Photosynthesis b. Cellular respiration c. Combustion of fuels d. Decomposition

c. Photosynthesis uses carbon dioxide produced during cellular respiration; Cellular respiration uses oxygen produced during photosynthesis

Which of these statements accurately describes how photosynthesis and cellular respiration are related? a. Photosynthesis requires sunlight to produce ATP, while cellular respiration can produce sugar without sunlight b. Photosynthesis only occurs in the presence of sunlight, while cellular respiration only occurs in the presence of carbon dioxide gas c. Photosynthesis uses carbon dioxide produced during cellular respiration; Cellular respiration uses oxygen produced during photosynthesis d. Photosynthesis uses oxygen produced during cellular respiration; Cellular respiration uses carbon dioxide produced during photosynthesis

D. Mitochondrion - Converts energy found in glucose into energy used by the cell

Which organelle is correctly paired with the function it performs in the process of producing energy for organisms? A. Chloroplast - Converts food energy into chemical energy B. Chloroplast - Breaks down chemical compounds into carbon dioxide and water C. Mitochondrion - Breaks down carbon dioxide to release glucose and oxygen D. Mitochondrion - Converts energy found in glucose into energy used by the cell

b. chloroplast

Which organelle is responsible for photosynthesis? a. cell membrane b. chloroplast c. endoplasmic reticulum d. mitochondria

a. Chloroplast

Which organelle makes the food? a. Chloroplast b. Ribosome c. Vacuole d. Nucleus

b. Chloroplast

Which organelle produces food? a. Nucleus b. Chloroplast c. Mitochondria d. Central vacuole

B. It provides the energy necessary for processes to occur within the cell

Which statement BEST explains the function of ATP as an important component of normal cellular functions? A. It provides the oxygen necessary for cells to undergo photosynthesis B. It provides the energy necessary for processes to occur within the cell C. It provides the carbon necessary for the cell to produce DNA D. It provides the code necessary for the manufacture of proteins in the cell

d. Water is a reactant, and oxygen is a product

Which statement about the light-dependent reactions of photosynthesis is correct? a. Carbon dioxide is a reactant, and glucose is a product b. Carbon dioxide is a reactant, and oxygen is a product c. Water is a reactant, and glucose is a product d. Water is a reactant, and oxygen is a product

D. The products of the light-dependent reactions provide the energy to drive the light-independent reactions

Which statement describes a difference between the dark (light-independent) reactions and the light-dependent reactions? A. Light-independent reactions can only occur after sunset or during cloudy days, while light-dependent reactions only occur when it is sunny B. Light-independent reactions store energy as ATP and NADH, while light-dependent reactions store energy as glucose C. The light-dependent reactions occur in the leaves of plants, and the light-independent reactions occur in the limbs and trunks D. The products of the light-dependent reactions provide the energy to drive the light-independent reactions

b. Photosynthesis transforms energy into food while cellular respiration transforms food into energy

Which statement describes a difference between the processes of photosynthesis and cellular respiration? a. Photosynthesis is a process that does not require energy while cellular respiration requires energy to occur b. Photosynthesis transforms energy into food while cellular respiration transforms food into energy c. Photosynthesis produces energy while cellular respiration consumes energy d. Photosynthesis is an extracellular process while cellular respiration is an intracellular process

A. Water is required for the light-dependent reactions, and carbon dioxide is required for the light-independent reactions

Which statement is true concerning the light-dependent and light-independent reactions of photosynthesis? A. Water is required for the light-dependent reactions, and carbon dioxide is required for the light-independent reactions B. Glucose is required for the light-dependent reactions, and oxygen is required for the light-independent reactions C. Oxygen is required for the light-dependent reactions, and glucose is required for the light-independent reactions D. Carbon dioxide is required for the light-dependent reactions, and water is required for the light-independent reactions

b. The light-dependent reaction supplies chemical energy

Why is the Calvin cycle dependent on the light-dependent reaction? a. The light-dependent reaction supplies light energy b. The light-dependent reaction supplies chemical energy c. The light-dependent reaction supplies CO2 d. The light-dependent reaction supplies water

It allows the energy to be passed from one organism to another

Why is the energy storage that takes place in photosynthesis so important?

d. Water supplies the plant with electrons for the electron transport chain

Why is water so important to a plant? a. Water is the source of carbon dioxide for cellular respiration b. Water is an important source of ATP molecules c. Water accepts light energy in photosynthesis d. Water supplies the plant with electrons for the electron transport chain