Question 1

Which of the following molecules best describes the primary form in which plants stockpile extra sugar produced by photosynthesis?

Accepted Answer

A)   glucose
B)   sucrose
C)   cellulose
D)   starch

Question 2

Which process is most directly driven by light energy?

Accepted Answer

A)   creation of a pH gradient by pumping protons across the thylakoid membrane
B)   reduction of NADP+ molecules
C)   transfer of energy from pigment molecule to pigment molecule
D)   ATP synthesis

Question 3

A flask containing photosynthetic green algae and a control flask containing only water are exposed to a cycle of 12 hours of light and 12 hours of darkness. Which of the following statements best describes how the relative dissolved oxygen concentration in the flask with algae will compare to the control flask?

Accepted Answer

A)   It will always be higher in the control.
B)   It will always be lower in the control.
C)   It will be lower in the control in the light, but the same in the dark.
D)   It will be lower in the control in the light, but higher in the control in the dark.

Question 4

Which of the following statements best describes the relationship between autotrophs and heterotrophs?

Accepted Answer

A)   Autotrophs produce their organic molecules from CO2 and other inorganic molecules, whereas heterotrophs obtain their organic molecules from compounds produced by other organisms.
B)   Heterotrophs produce their organic molecules from CO2 and other inorganic molecules, whereas autotrophs obtain their organic molecules from compounds produced by other organisms.
C)   Both autotrophs and heterotrophs produce some of their organic molecules from CO2 and other inorganic molecules.
D)   Heterotrophs are considered the producers of the biosphere, whereas autotrophs are consumers.

Question 5

Which of the following processes is directly associated with photosystem I?

Accepted Answer

A)   receiving electrons from the thylakoid membrane electron transport chain
B)   generating molecular oxygen
C)   extracting hydrogen electrons from the splitting of water
D)   passing electrons to NADP+

Question 6

Which of the following statements best describes the accompanying figure?

Accepted Answer

A)   It represents a C4 photosynthetic system.
B)   It represents an adaptation that maximizes photorespiration.
C)   It represents a C3 photosynthetic system.
D)   It represents a CAM photosynthetic system.

Question 7

Which of the following statements best describes the conditions under which the Calvin cycle and cellular respiration occur in plants?

Accepted Answer

A)   The Calvin cycle and cellular respiration both occur only in the light.
B)   The Calvin cycle occurs only in the light, and cellular respiration occurs only in the dark.
C)   The Calvin cycle occurs only in the dark, and cellular respiration occurs in both the dark and the light.
D)   The Calvin cycle and cellular respiration both occur in the dark and the light.

Question 8

The accompanying figure shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis. Which of the following statements best explains the low rate of photosynthesis at 550 nm?

Accepted Answer

A)   Green and yellow wavelengths inhibit the absorption of red and blue wavelengths.
B)   Oxygen given off during photosynthesis interferes with the absorption of light.
C)   Other photosynthetic pigments absorb light in addition to chlorophyll a.
D)   Chlorophyll a does not absorb 550 nm light well.

Question 9

In chloroplasts, the photosynthetic electron transport chain acidifies which of the following cellular compartments?

Accepted Answer

A)   mitochondrial matrix
B)   stroma
C)   thylakoid space
D)   cytosol

Question 10

Which of the following molecules will accumulate if light reactions occur normally, but the Calvin Cycle is inhibited?

Accepted Answer

A)   CO2 and glucose
B)   H2O and O2
C)   ADP, 2 and glucose 
B)   H2O and O2 
C)   ADP,   i, and NADP+ 
D)   ATP and NADPH " class="answers-bank-image d-inline" rel="preload" > i, and NADP+
D)   ATP and NADPH

Question 11

Which of the following statements correctly describes a distinction between autotrophs and heterotrophs?

Accepted Answer

A)   Only heterotrophs perform cellular respiration.
B)   Only heterotrophs have mitochondria.
C)   Only autotrophs can produce organic molecules from CO2 and other inorganic materials.
D)   Only autotrophs require oxygen to produce organic molecules.

Question 12

Lab students placed ten spinach leaf disks in each of three test tubes containing a baking soda solution and a control tube without baking soda. The volume of liquid in each tube and the temperature of the solutions were held constant. All tubes were placed an equal distance from a light source as indicated in the accompanying table. After 10 minutes, the amount of oxygen present in each sample was measured.

Which tube is expected to contain the greatest quantity of oxygen?

Accepted Answer

A)   Tube 1
B)   Tube 2
C)   Tube 3
D)   Tube 4

Question 13

In which cellular structure are the enzymes of the Calvin cycle localized?

Accepted Answer

A)   stroma of the chloroplast
B)   thylakoid membrane
C)   interior of the thylakoid (thylakoid space) 
D)   outer membrane of the chloroplast

Question 14

Carotenoids are often found in foods that are considered to have antioxidant properties in human nutrition. Which of the following statements best describes a related function they serve in plants?

Accepted Answer

A)   They serve as accessory pigments to increase light absorption.
B)   They protect against oxidative damage from excessive light energy.
C)   They shield the sensitive chromosomes of the plant from harmful ultraviolet radiation.
D)   They reflect orange light and enhance red light absorption by chlorophyll. B

Question 15

In which cell of the accompanying figure would elevated oxygen concentrations have the greatest inhibitory effect on carbon fixation reactions?

Accepted Answer

A)   cell I only
B)   cell II only
C)   neither cell I nor cell II
D)   both cell I and cell II B

Question 16

Which of the following observations would be the best indicator that an organism lacks photosystem II?

Accepted Answer

A)   It produces glucose in the light and dark.
B)   It does not produce CO2 in the dark.
C)   It does not produce O2 in the light.
D)   It produces CO2 in the light.

Question 17

Which of the following events are associated with chemiosmosis in chloroplasts?

Accepted Answer

A)   The pH of the stroma increases and ATP is synthesized.
B)   The pH of the thylakoid space increases and ATP is synthesized.
C)   The pH of the cytosol outside the chloroplast decreases and ATP is synthesized.
D)   The pH of the stroma decreases and ATP is hydrolyzed. B

Question 18

Which of the following processes occurs in the Calvin cycle?

Accepted Answer

A)   reduction of NADPH
B)   release of oxygen
C)   reduction of CO2
D)   production of ATP

Question 19

Which of the following statements best explains the ability of CAM plants to synthesize sugars in the daytime while keeping their stomata closed to reduce water loss?

Accepted Answer

A)   They fix CO2 into organic acids during the night.
B)   They fix CO2 into sugars in the bundle-sheath cells.
C)   They fix CO2 into pyruvate in the mesophyll cells.
D)   They use photosystem I and photosystem II at night.

Question 20

How is photosynthesis similar in C4 plants and CAM plants?

Accepted Answer

A)   In both cases, only photosystem I is used.
B)   Both types of plants make sugar without the Calvin cycle.
C)   In both cases, rubisco is not used to fix carbon initially.
D)   Both types of plants make most of their sugar in the dark.

Exam 11: Photosynthetic Processes

Which of the following molecules best describes the primary form in which plants stockpile extra sugar produced by photosynthesis?

Correct Answer
verified

Which process is most directly driven by light energy?

Correct Answer
verified

Correct Answer
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Which of the following statements best describes the relationship between autotrophs and heterotrophs?

Correct Answer
verified

Which of the following processes is directly associated with photosystem I?

Correct Answer
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Which of the following statements best describes the accompanying figure?

Correct Answer
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Which of the following statements best describes the conditions under which the Calvin cycle and cellular respiration occur in plants?

Correct Answer
verified

The accompanying figure shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis. Which of the following statements best explains the low rate of photosynthesis at 550 nm?

Correct Answer
verified

In chloroplasts, the photosynthetic electron transport chain acidifies which of the following cellular compartments?

Correct Answer
verified

Which of the following molecules will accumulate if light reactions occur normally, but the Calvin Cycle is inhibited?

Correct Answer
verified

Which of the following statements correctly describes a distinction between autotrophs and heterotrophs?

Correct Answer
verified

Correct Answer
verified

In which cellular structure are the enzymes of the Calvin cycle localized?

Correct Answer
verified

Carotenoids are often found in foods that are considered to have antioxidant properties in human nutrition. Which of the following statements best describes a related function they serve in plants?

Correct Answer
verified
B

In which cell of the accompanying figure would elevated oxygen concentrations have the greatest inhibitory effect on carbon fixation reactions?

Correct Answer
verified
B

Which of the following observations would be the best indicator that an organism lacks photosystem II?

Correct Answer
verified

Which of the following events are associated with chemiosmosis in chloroplasts?

Correct Answer
verified
B

Which of the following processes occurs in the Calvin cycle?

Correct Answer
verified

Which of the following statements best explains the ability of CAM plants to synthesize sugars in the daytime while keeping their stomata closed to reduce water loss?

Correct Answer
verified

How is photosynthesis similar in C4 plants and CAM plants?

Correct Answer
verified

Exam 11: Photosynthetic Processes

Which of the following molecules best describes the primary form in which plants stockpile extra sugar produced by photosynthesis?

Correct AnswerverifiedShow Answer

Which process is most directly driven by light energy?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following statements best describes the relationship between autotrophs and heterotrophs?

Correct AnswerverifiedShow Answer

Which of the following processes is directly associated with photosystem I?

Correct AnswerverifiedShow Answer

Which of the following statements best describes the accompanying figure?

Correct AnswerverifiedShow Answer

Which of the following statements best describes the conditions under which the Calvin cycle and cellular respiration occur in plants?

Correct AnswerverifiedShow Answer

The accompanying figure shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis. Which of the following statements best explains the low rate of photosynthesis at 550 nm?

Correct AnswerverifiedShow Answer

In chloroplasts, the photosynthetic electron transport chain acidifies which of the following cellular compartments?

Correct AnswerverifiedShow Answer

Which of the following molecules will accumulate if light reactions occur normally, but the Calvin Cycle is inhibited?

Correct AnswerverifiedShow Answer

Which of the following statements correctly describes a distinction between autotrophs and heterotrophs?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In which cellular structure are the enzymes of the Calvin cycle localized?

Correct AnswerverifiedShow Answer

Carotenoids are often found in foods that are considered to have antioxidant properties in human nutrition. Which of the following statements best describes a related function they serve in plants?

Correct AnswerverifiedB

In which cell of the accompanying figure would elevated oxygen concentrations have the greatest inhibitory effect on carbon fixation reactions?

Correct AnswerverifiedB

Which of the following observations would be the best indicator that an organism lacks photosystem II?

Correct AnswerverifiedShow Answer

Which of the following events are associated with chemiosmosis in chloroplasts?

Correct AnswerverifiedB

Which of the following processes occurs in the Calvin cycle?

Correct AnswerverifiedShow Answer

Which of the following statements best explains the ability of CAM plants to synthesize sugars in the daytime while keeping their stomata closed to reduce water loss?

Correct AnswerverifiedShow Answer

How is photosynthesis similar in C4 plants and CAM plants?

Correct AnswerverifiedShow Answer

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B

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B

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B

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