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
