Photosynthisis practice questions

What happens to the other 10 PGAL that form in the dark reaction after two leave the cycle? 10/10 They are used to reform other sugars to keep the cycle going They are used to make lipids They are used to make ATP They are not used and thrown away

They are used to reform other sugars to keep the cycle going

What are the two raw materials needed for the light reaction to occur? 10/10 Carbon Dioxide and Oxygen Water and Oxygen Water and Sunlight Carbon Dioxide and Sunlight

Water and Sunlight

Which is considered to be the principle pigment in most plants? 10/10 chlorophyll carotene xanthophyll hemoglobin

chlorophyll

A process is shown, water + substace A turns into (with help of D) letter B and C Which correctly identifies these letters? A, B, C, D enzyme, oxygen, CO2, glucose CO2, glucose, oxygen, enzymes glucose, enzymes, oxygen, CO2 oxygen, glucose, CO2, enzymes

CO2, glucose, oxygen, enzymes

Which of the following is another name for the dark reaction? 10/10 Calvin Cycle photolysis ATP Synthase The Dark Side

Calvin Cycle

The dark reactions of photosynthesis are also known as: 10/10 Carbon Fixation Photochemical Reactions Respiration Dehydration Synthesis

Carbon Fixation

Which of the four steps of the light reaction must occur first? 10/10 Chlorophyll absorbs sunlight Sunlight splits a water molecule NADP picks up the hydrogen ATP is made

Chlorophyll absorbs sunlight

The diagram shows light energy hitting a circle, substance a, and substance B and C are entering forming substance D. Substance D helps with metobolic activity. Which correctly identifies these letters? A, B, C, D ribosome, oxygen, CO2, water mitochondrion, water, oxygen, protein nucleus, nitrogen, carbon, starch chloroplast, CO2, water, glucose

chloroplast, CO2, water, glucose

Which part of the leaf is made of wax and helps reduce water loss from the leaf? 10/10 stomate xylem phloem cuticle

cuticle

Which of the following parts of the leaf is known to be the thin flattened part of the whole leaf? 10/10 petiole midrib blade guard cell

blade

he equation below represents a summary of a biological process. carbon dioxide + water glucose + water + oxygen This process is completed in (1) mitochondria (3) cell membranes (2) ribosomes (4) chloroplasts

(4) chloroplasts

What is the energy source for the light reaction of photosynthesis? 10/10 NADP Hydrogen ATP Sunlight

Sunlight

X=guard cell hich life functions are directly regulated through feedback mechanisms associated with the actions of the structures labeled X? (1) excretion and immunity (2) digestion and coordination (3) circulation and reproduction (4) respiration and photosynthesis

(4) respiration and photosynthesis

Which gas is necessary for the dark reaction to proceed? 10/10 oxygen carbon dioxide nitrogen gas water vapor

carbon dioxide

Which inorganic raw material used in the dark reaction is taken into the leaf through the stomates? 10/10 Oxygen water vapor sunlight carbon dioxide

carbon dioxide

Which two inorganic molecules are necessary for photosynthesis to occur? 10/10 carbon dioxide and oxygen oxygen and water carbon dioxide and water carbon dioxide and nitrogen

carbon dioxide and water

17. Organisms that have the ability to use an atmospheric gas to produce an organic nutrient are known as (1) herbivores (2) decomposers (3) carnivores (4) autotrophs

(4) autotrophs

Organisms that are able to manufacture organic nutrients from substances in the abiotic environment are classified as (l) heterotrophs (3) predators (2) fungi (4) autotrophs

(4) autotrophs

A student performed an experiment to demonstrate that a plant needs chlorophyll for photosynthesis. He used plants that had green leaves with white areas. After exposing the plants to sunlight, he removed a leaf from each plant and processed the leaves to remove the chlorophyll. He then tested each leaf for the presence of starch. Starch was found in the area of the leaf that was green, and no starch was found in the area of the leaf that was white. He concluded that chlorophyll is necessary for photosynthesis. Which statement represents an assumption the student had to make in order to draw this conclusion? (1) Starch is synthesized from the glucose produced in the green areas of the leaf. (2) Starch is converted to chlorophyll in the green areas of the leaf. (3) The white areas of the leaf do not (4) The green areas of the leaf are heterotrophic.

(1) Starch is synthesized from the glucose produced in the green areas of the leaf.

Different plants lose different amounts of water each day. One reason each plant loses a different amount of water is that each has (1) different guard cells adapted to maintain homeostasis (2) different types of insulin-secreting cells that regulate water levels (3) the same number of chloroplasts but different rates of photosynthesis (4) the same rate of photosynthesis but different numbers of chloroplasts

(1) different guard cells adapted to maintain homeostasis

small piece ofblack paper was folded in half and used to cover part of the top and bottom portions of a leaf on a living geranium plant. After the plant was kept in sunlight for several days, the paper was removed. The leafwas then boiled in alcohol to remove the chlorophyll and placed in Lugol's iodine solution, which turns blue-black in the presence ofstarch. Only the part of the leaf that had not been covered turned blue-black. This investigation was most likely testing the hypothesis that (1) light is necessary for photosynthesis to occur (2) alcohol plus chlorophyll forms Lugol's iodine solution (3) green plants use carbon dioxide in photosynthesis (4) plants use alcohol in the production of chlorophyll

(1) light is necessary for photosynthesis to occur

An expirment is shown where black paper is covering both sides of part of a leaf. Which hypothesis would most likely be tested using this setup? 1) Light is needed for the process of reproduction. (2) Glucose is not synthesized by plants in the dark. (3) Protein synthesis takes place in leaves. (4) Plants need fertilizers for proper growth.

(2) Glucose is not synthesized by plants in the dark.

In the diagram, a tree is bringing in water, and the leaf is bringing in CO2, and sunlight and releasing O2. Which statement concerning this process is correct? (1) The process represented is respiration and the primary source of energy for the process is the Sun. (2) The process represented is photosynthesis and the primary source of energy for the process is the Sun. (3) This process converts energy in organic compounds into solar energy which is released into the atmosphere. (4) This process uses solar energy to convert oxygen into carbon dioxide.

(2) The process represented is photosynthesis and the primary source of energy for the process is the Sun.

hich process is directly used by autotrophs to store energy in glucose? (1) diffusion (3) respiration (2) photosynthesis (4) active transport

(2) photosynthesis

n the leaf of a plant, guard cells help to (1) destroy atmospheric pollutants when they enter the plant (2) regulate oxygen and carbon dioxide levels (3) transport excess glucose to the roots (4) block harmful ultraviolet rays that can disrupt chlorophyll production

(2) regulate oxygen and carbon dioxide levels

A (inorganic molecules) turns to B (organic molecules) in a biological process Which set of molecules is best represented by letters A and B? (1) A:oxygen and water B: glucose (2) A: glucose B: carbon dioxide and water (3) A: carbon dioxide and water B: glucose (4) A: glucose B: oxygen and water

(3) A: carbon dioxide and water B: glucose

Eating a sweet potato provides energy for human metabolic processes. The original source of this energy is the energy (1) in protein molecules stored within the potato (2) from starch molecules absorbed by the potato plant (3) made available by photosynthesis (4) in vitamins and minerals found

(3) made available by photosynthesis

Which process usually uses carbon dioxide molecules? (1) cellular respiration (2) asexual reproduction (3) active transport (4) autotrophic nutrition

(4) autotrophic nutrition

What are the two forms of energy created in the light reaction that then move to the dark reaction? 10/10 ADP and oxygen ATP and NADPH ADP and NADPH Oxygen and ATP

ATP and NADPH

Which two energy sources are used in the dark reaction? 10/10 ATP and ADP NADPH and light ATP and NADPH ATP and light

ATP and NADPH

What do the letter ATP stand for when referring to this high energy molecule? 10/10 Adenosine Triphosphate Adenine Triamino Acid Adenosine Diphosphate Adenine Triamino Phosphate

Adenosine Triphosphate

Why is the ATP-ADP cycle so important to the cell? 10/10 Because it releases oxygen as a waste product Because it splits water and releases energy Because it allows ATP to be made available for cells to do work Because it allows ADP to be made available to the cells to do work

Because it allows ATP to be made available for cells to do work

When two PGAL join together, what important carbohydrate forms? 10/10 Glucose Protein Cellulose Lipid

Glucose

When ATP is brought over from the light reaction to the dark reaction, what does it actually do during the Calvin Cycle? 10/10 It powers photolysis It powers the absorption of light by the chlorophyll It energizes the 12 three carbon sugars in order to form the PGAL It helps with the release of Carbon dioxide

It energizes the 12 three carbon sugars in order to form the PGAL

Besides ATP, another molecule used to transfer energy from the light reaction to the dark reaction is the molecule known as: 10/10 NADP ADP glucose Carbon dioxide

NADP

Which molecule or element is not used during the reactions of photosynthesis? 10/10 Nitrogen Carbon Dioxide Water ATP

Nitrogen

What is the name of the "baby" sugar produced in the Dark Reactions of photosynthesis? 10/10 glucose PGAL Starch ATP

PGAL

The light reactions of photosynthesis are also known as: 10/10 Carbon fixation Calvin Cycle Photochemical Reactions respiration

Photochemical Reactions

Where is the energy stored within the ATP molecule? 10/10 Within the ribose sugar Within the phosphate group Within the adenosine Within the high energy bonds between the phosphates

Within the high energy bonds between the phosphates

Where is the electron transport chain of the light reaction located exactly? 10/10 Within the membranes of the thylakoid in the stroma of the chloroplast in the lumen of the thylakoid none of the above

Within the membranes of the thylakoid

When water is split during photolysis and the hydrogen is released, where does the electron initially go to begin the electron transport chain? 10/10 a chlorophyll molecule the ATP synthase molecule a phospholipid molecule a NADP molecule

a chlorophyll molecule

Which organic molecule collects within plant cells as a result of photosynthesis? 10/10 lipid protein glucose DNA

glucose

Where in the chloroplast do the light reactions of photosynthesis take place? 10/10 grana stroma inner membrane outer membrane

grana

Which part of the leaf is used to maintain homeostasis in the leaf? 10/10 spongy layer palisade layer guard cells vein

guard cells

Where in the chloroplast does the light reaction take place? 10/10 in the stroma of the chloroplast in the grana of the chloroplast in the stomata of the leaf in the lower epidermis of the leaf

in the grana of the chloroplast

The organ for photosynthesis in plants is the: 10/10 root stem leaf flower

leaf

What are the three raw materials plants need to carry out photosynthesis? 10/10 light, oxygen and water light, carbon dioxide and oxygen light, carbon dioxide and soil light, carbon dioxide and water

light, carbon dioxide and water

Which organism, out of the following, is not an autotroph? 10/10 moss mushroom algae seaweed

mushroom

What colors are the pigments known as carotenoids? 10/10 oranges and yellows orange-red pigments blues and reds greens and yellows

orange-red pigments

What is the waste product of the light reactions of photosynthesis? 10/10 oxygen carbon dioxide ATP NADPH

oxygen

What are the two waste products that are produced as a bi-products of photosynthesis? 10/10 oxygen and water carbon dioxide and water carbon dioxide and oxygen water and nitrogen

oxygen and water

Which layer of the leaf contains cells with the most chloroplasts? 10/10 spongy layer palisade layer epidermal layer vascular layer

palisade layer

Which layer of the leaf is known to be the one where most photosynthesis takes place? 10/10 spongy layer palisade layer upper epidermis lower epidermis

palisade layer

Which of the following types of leaves is described as having many leaflets attached at one main point? 10/10 simple leaf palmately compound leaf pinnately compound leaf none of the above

palmately compound leaf

Which of the following types of veins are described as those that run straight up and down the leaf in adjacent (side by side) lines? 10/10 parallel veins netted veins palmate veins none of the above

parallel veins

What is the name of the process by which light splits water? 10/10 electron transport hydrogen movement photolysis phosphorylation

photolysis

Light absorbing molecules known as _________ are an essential part of photosynthesis. 10/10 hemoglobins phospholipids pigments glycolipids

pigments

Which two colors of light are considered to be the best for photosynthesis? 10/10 green and blue red and blue blue and yellow red and yellow

red and blue

Which part of the leaf is used to carry out diffusion of gases? 10/10 spongy layer palisade layer cuticle vein

spongy layer

What part of the chloroplast is described as a liquid? 10/10 grana stroma thylakoid inner membrane

stroma

Within which part of the chloroplast does the dark reaction occur? 10/10 thylakoid grana stroma cytoplasm

stroma

Which of the following parts of the thylakoid membrane is directly responsible for the synthesis of ATP? 10/10 the electron transport chain the chlorophyll molecules the lipids the ATP synthase molecule

the ATP synthase molecule

How many carbons does one molecule of PGAL have? 10/10 one two three six

three

Each granum is made up of many individual discs called________________. 10/10 stroma thylakoids guard cells xylem cells

thylakoids

Which part of the leaf conducts water and minerals in an upward direction throughout the plant? 10/10 xylem phloem cuticle air space

xylem

Which two cell types are used for transport of water, minerals and dissolved sugars and other nutrients? 10/10 xylem and phloem guard cells and stomates upper and lower epidermis spongy and palisade layer

xylem and phloem