Question 1

Characterize these reactions involved in the Calvin cycle. 2.Energy is required in the form of ATP,which is hydrolyzed to ADP.The substrate BPG is reduced,while the coenzyme NADPH is oxidized. C) These reactions are involved in the fixation of CO2. Energy is required in the form of ADP,which is hydrolyzed to ATP.The substrate BPG is oxidized,while the coenzyme NADPH is reduced. D) These reactions are part of the light reactions in a noncyclic pathway.ATP and NADPH are used during these reactions." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  These are reactions involved in the regeneration of RuBP.The reactions include an exergonic reaction (ATP breaks down into ADP) and the reduction of the coenzyme NADPH.
B)  These reactions are involved in the reduction of CO2.Energy is required in the form of ATP,which is hydrolyzed to ADP.The substrate BPG is reduced,while the coenzyme NADPH is oxidized.
C)  These reactions are involved in the fixation of CO2. Energy is required in the form of ADP,which is hydrolyzed to ATP.The substrate BPG is oxidized,while the coenzyme NADPH is reduced.
D)  These reactions are part of the light reactions in a noncyclic pathway.ATP and NADPH are used during these reactions.E) B) and D)
F) None of the above B

Question 2

In the questions that follow, you will be asked to identify the blanks on the below diagram using the word bank: NADPH, NADP, ATP, ADP + P, carbon dioxide, oxygen, carbohydrate, water. Briefly explain the significance of each item.

-B is ________.

Accepted Answer

B is oxygen.The splitting of water durin...

Question 3

The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule,which is a reaction assisted by large quantities of RuBP carboxylase enzyme.

Accepted Answer

A) True 
 B)False

Question 4

What would happen if a drug directly interfered with the functioning of RuBP carboxylase?

Accepted Answer

A)  Water would not be split at the start of photosystem II,halting the light reactions.
B)  Chemiosmosis and ATP production would cease,halting the Calvin cycle.
C)  Carbon dioxide would not be fixed to RuBP,stalling the Calvin cycle.
D)  RuBP would not be regenerated from G3P,halting the Calvin cycle.E) A) and B)
F) B) and C)

Question 5

What is the ultimate destination for the energized electrons during the light reactions of photosynthesis?

Accepted Answer

A)  They are taken up by NADP+ to produce NADPH.
B)  They are taken up by NADPH to produce NADP+.
C)  They are taken up by NADH to produce NAD+.
D)  They are taken up by NAD+ to produce NADH.E) C) and D)
F) None of the above

Question 6

Chemiosmotic ATP synthesis occurs in the cytosol of the cell.

Accepted Answer

A) True 
 B)False

Question 7

Photosynthesis involves oxidation - reduction and the movement of electrons from one molecule to another.Recall what oxidation and reduction reactions are and study the figure to identify A and B as either oxidation or reduction.

Accepted Answer

A is a reduction.Carbon dioxide is reduc...

Question 8

Photorespiration occurs mainly in

Accepted Answer

A)  C3 plants.
B)  C4 plants.
C)  CAM plants.
D)  All of the answer choices.E) C) and D)
F) A) and D)

Question 9

Phosphoenolpyruvate carboxylase (PEPCase)fixes carbon dioxide (C1)to PEP (C3)to form oxaloacetate (C4)within mesophyll cells of the C4 plants.

Accepted Answer

A) True 
 B)False

Question 10

A product of photosynthesis,________,is the chief source of energy for most organisms.

Accepted Answer

A)  oxygen
B)  sucrose
C)  glucose
D)  All of the answer choices.E) A) and B)
F) A) and C) C

Question 11

Which of the following pairs is correct?

Accepted Answer

A)  C4 plants = bundle sheath cells contain chlorophyll
B)  C3 plants = bundle sheath cells contain chlorophyll
C)  CAM plants = epidermal cells contain chlorophyll
D)  C4 plants = stoma contain chlorophyllE) A) and D)
F) A) and C)

Question 12

Create an experiment that tests this null hypothesis: The rate of photosynthesis does not vary with different wavelengths of light.

Accepted Answer

Answers will vary: An example follows.A ...

Question 13

The function of sunlight in photosynthesis is to

Accepted Answer

A)  reduce NADPH to NADP.
B)  fix O2 in the Calvin cycle.
C)  excite electrons in chlorophyll.
D)  combine carbon dioxide and water to form ATP and NADPH.
E)  split water releasing oxygen.F) C) and E)
G) A) and C)

Question 14

Which of the following is a common photosynthetic pigment found in plants? Select all that apply.

Accepted Answer

A)  chlorophyll a
B)  chlorophyll c
C)  carotenoids
D)  chlorophyll bE) A) and B)
F) A) and C) A,C,D

Question 15

The action spectrum of photosynthesis shows a high light absorption for violet/blue and orange/red and a low absorption for green/yellow.If we were to set up an experiment where narrow bands of unicolored light were shown on an aquatic plant such as Elodea,and we counted the number of bubbles of oxygen produced as an indicator of photosynthetic rate,how would the graph appear?

Accepted Answer

A)  just like the action spectrum with peaks at violet/blue and orange/red and a trough at yellow/green
B)  exactly inverted from the action spectrum with a peak for yellow/green
C)  perfectly flat because many wavelengths are used by chlorophyll
D)  a descending line because ultraviolet light has more energy than infrared
E)  There is no way to guess without actually running the experiment.F) All of the above
G) C) and D)

Question 16

The light-dependent reactions of photosynthesis occur in the stroma of the chloroplast.

Accepted Answer

A) True 
 B)False

Question 17

When an electron has been excited to a higher energy state,it can then drop back to the original level,re-emitting the light as fluorescence.When chlorophyll is extracted in solution,and a bright red or blue light is shown on it,the chlorophyll fluoresces brightly.However,when the chlorophyll is packaged inside chloroplasts and the red or blue light is turned on,there is no fluorescence.This most likely indicates that

Accepted Answer

A)  the red and blue light waves are reflected by the chlorophyll membrane.
B)  chlorophyll in solution is a different molecule than chlorophyll in a chloroplast.
C)  excited electrons are transferred to electron acceptors in the chloroplast.
D)  fluorescence does not work in living cells.
E)  green light must be used to make living cells fluoresce.F) B) and C)
G) A) and E)

Question 18

G3P (glyceraldehyde-3-phosphate) can be used by plants to form which of the following? Select all that apply.

Accepted Answer

A)  fatty acids
B)  amino acids
C)  carbon dioxide
D)  starch
E)  NADPHF) A) and B)
G) A) and E)

Question 19

Why are plants green?

Accepted Answer

A)  They absorb only green wavelengths of light.
B)  They absorb only yellow and blue wavelengths of light,which when mixed within the leaf,give plants their characteristic green color.
C)  They reflect all of the ultraviolet wavelengths and absorb all of the visible light spectrum.
D)  They reflect green wavelengths of light and absorb other colors of the visible light spectrum.
E)  They reflect the colors of the visible light spectrum and absorb all of the wavelengths associated with the ultraviolet spectrum.F) A) and E)
G) None of the above

Question 20

What structure is required for an eukaryotic organism to be classified as an autotroph?

Accepted Answer

A)  chloroplast
B)  mitochondria
C)  nucleus
D)  Golgi bodyE) A) and D)
F) None of the above

Exam 7: Photosynthesis

Characterize these reactions involved in the Calvin cycle.

Correct Answer
verified
B

In the questions that follow, you will be asked to identify the blanks on the below diagram using the word bank: NADPH, NADP, ATP, ADP + P, carbon dioxide, oxygen, carbohydrate, water. Briefly explain the significance of each item. -B is ________.

Correct Answer
verified
B is oxygen.The splitting of water durin...
View Answer

The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule,which is a reaction assisted by large quantities of RuBP carboxylase enzyme.

Correct Answer
verified

What would happen if a drug directly interfered with the functioning of RuBP carboxylase?

Correct Answer
verified

What is the ultimate destination for the energized electrons during the light reactions of photosynthesis?

Correct Answer
verified

Chemiosmotic ATP synthesis occurs in the cytosol of the cell.

Correct Answer
verified

Photosynthesis involves oxidation - reduction and the movement of electrons from one molecule to another.Recall what oxidation and reduction reactions are and study the figure to identify A and B as either oxidation or reduction.

Correct Answer
verified
A is a reduction.Carbon dioxide is reduc...
View Answer

Photorespiration occurs mainly in

Correct Answer
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Phosphoenolpyruvate carboxylase (PEPCase)fixes carbon dioxide (C₁)to PEP (C₃)to form oxaloacetate (C₄)within mesophyll cells of the C₄ plants.

Correct Answer
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A product of photosynthesis,________,is the chief source of energy for most organisms.

Correct Answer
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C

Which of the following pairs is correct?

Correct Answer
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Create an experiment that tests this null hypothesis: The rate of photosynthesis does not vary with different wavelengths of light.

Correct Answer
verified
Answers will vary: An example follows.A ...
View Answer

The function of sunlight in photosynthesis is to

Correct Answer
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Which of the following is a common photosynthetic pigment found in plants? Select all that apply.

Correct Answer
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A,C,D

Correct Answer
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The light-dependent reactions of photosynthesis occur in the stroma of the chloroplast.

Correct Answer
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Correct Answer
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G3P (glyceraldehyde-3-phosphate) can be used by plants to form which of the following? Select all that apply.

Correct Answer
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Why are plants green?

Correct Answer
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What structure is required for an eukaryotic organism to be classified as an autotroph?

Correct Answer
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Exam 7: Photosynthesis

Characterize these reactions involved in the Calvin cycle.

Correct AnswerverifiedB

In the questions that follow, you will be asked to identify the blanks on the below diagram using the word bank: NADPH, NADP, ATP, ADP + P, carbon dioxide, oxygen, carbohydrate, water. Briefly explain the significance of each item. -B is ________.

Correct AnswerverifiedB is oxygen.The splitting of water durin...View AnswerShow Answer

The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule,which is a reaction assisted by large quantities of RuBP carboxylase enzyme.

Correct AnswerverifiedShow Answer

What would happen if a drug directly interfered with the functioning of RuBP carboxylase?

Correct AnswerverifiedShow Answer

What is the ultimate destination for the energized electrons during the light reactions of photosynthesis?

Correct AnswerverifiedShow Answer

Chemiosmotic ATP synthesis occurs in the cytosol of the cell.

Correct AnswerverifiedShow Answer

Photosynthesis involves oxidation - reduction and the movement of electrons from one molecule to another.Recall what oxidation and reduction reactions are and study the figure to identify A and B as either oxidation or reduction.

Correct AnswerverifiedA is a reduction.Carbon dioxide is reduc...View AnswerShow Answer

Photorespiration occurs mainly in

Correct AnswerverifiedShow Answer

Phosphoenolpyruvate carboxylase (PEPCase)fixes carbon dioxide (C1)to PEP (C3)to form oxaloacetate (C4)within mesophyll cells of the C4 plants.

Correct AnswerverifiedShow Answer

A product of photosynthesis,________,is the chief source of energy for most organisms.

Correct AnswerverifiedC

Which of the following pairs is correct?

Correct AnswerverifiedShow Answer

Create an experiment that tests this null hypothesis: The rate of photosynthesis does not vary with different wavelengths of light.

Correct AnswerverifiedAnswers will vary: An example follows.A ...View AnswerShow Answer

The function of sunlight in photosynthesis is to

Correct AnswerverifiedShow Answer

Which of the following is a common photosynthetic pigment found in plants? Select all that apply.

Correct AnswerverifiedA,C,D

Correct AnswerverifiedShow Answer

The light-dependent reactions of photosynthesis occur in the stroma of the chloroplast.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

G3P (glyceraldehyde-3-phosphate) can be used by plants to form which of the following? Select all that apply.

Correct AnswerverifiedShow Answer

Why are plants green?

Correct AnswerverifiedShow Answer

What structure is required for an eukaryotic organism to be classified as an autotroph?

Correct AnswerverifiedShow Answer

Correct Answer
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B

Correct Answer
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B is oxygen.The splitting of water durin...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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A is a reduction.Carbon dioxide is reduc...
View Answer

Correct Answer
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Phosphoenolpyruvate carboxylase (PEPCase)fixes carbon dioxide (C₁)to PEP (C₃)to form oxaloacetate (C₄)within mesophyll cells of the C₄ plants.

Correct Answer
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Correct Answer
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C

Correct Answer
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Correct Answer
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Answers will vary: An example follows.A ...
View Answer

Correct Answer
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Correct Answer
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A,C,D

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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