Question 1

During noncyclic electron flow of the light reaction, which molecule is the final acceptor of the high-energy electron?

Accepted Answer

A)   oxygen
B)   P700
C)   NADP+
D)   P680
E)   ATP synthaseF) A) and B)
G) A) and C) C

Question 2

This molecule combines with CO2 to form the 3-carbon substance, 3-phosphoglycerate.

Accepted Answer

A)   glyceraldehyde-3-phosphate (G3P) 
B)   glucose
C)   ribulose biphoshpate (RuBP) 
D)   glycerol
E)   nicotinamide adenine dinucleotide phosphate (NADPH) F) A) and D)
G) D) and E) C

Question 3

Which is TRUE of succulent plants such as cacti or pineapple?

Accepted Answer

A)   They are C3 plants.
B)   They are highly efficient at photosynthesis in cooler and wet environments.
C)   They tend to undergo substantial rates of photorespiration.
D)   They produce 4-carbon malate in the first step of carbon fixation.
E)   They continually produce sugar, both day and night under hot arid conditions.F) A) and D)
G) B) and C)

Question 4

Which of the following statements regarding photosystem II is FALSE?

Accepted Answer

A)   Photosystem II encompasses a series of redox reactions.
B)   Photosystem II contains a chlorophyll molecule that absorbs light at 680 nm.
C)   Photosystem II strips an electron from water for direct transfer to the electron transport chain.
D)   Photosystem II oxidizes water to form oxygen.
E)   Photosystem II contains a series of pigments where energy is transferred by resonance energy transfer.F) D) and E)
G) C) and D)

Question 5

Which of the following has the highest photosynthetic efficiency in hot and dry environments?

Accepted Answer

A)   C3 plants
B)   C4 plants
C)   plants undergoing photorespiration
D)   plants that use oxygen to produce sugars
E)   plants that only produce sugar in the darkF) A) and B)
G) None of the above

Question 6

Which of the following is NOT a product of the Calvin cycle?

Accepted Answer

A)   glyceraldehyde-3-phosphate (G3P) 
B)   NADP+
C)   ADP
D)   NADPH
E)   PiF) A) and B)
G) A) and D)

Question 7

Which order of events for the Calvin cycle is correct?
I. Reduction
II. Regeneration of the CO2 acceptor (RuBP) 
III. Carbon fixation

Accepted Answer

A)   I, II, III
B)   III, II, I
C)   III, I, II
D)   II, I, III
E)   I, III, IIF) B) and E)
G) A) and B)

Question 8

Which of the following statements about chlorophyll is correct?

Accepted Answer

A)   It appears green because it absorbs light in the green light spectrum.
B)   It reflects all colors in the light spectrum except green.
C)   It reflects light in the green light spectrum.
D)   It reflects high-energy electrons.
E)   All of the choices are correct.F) B) and C)
G) C) and D)

Question 9

Which of the following statements about photorespiration is INCORRECT?

Accepted Answer

A)   Photorespiration tends to occur under dry and hot conditions.
B)   It utilizes oxygen to produce a 3-carbon sugar precursor.
C)   It liberates CO2.
D)   It occurs in C3 plants.
E)   It utilizes the enzyme PEP carboxylase rather than Rubisco to produce 3-phosphoglycerate.F) None of the above
G) A) and B)

Question 10

Which of the following type of organism is most likely an autotroph?

Accepted Answer

A)   caribou
B)   lion
C)   human
D)   tree
E)   parasiteF) A) and C)
G) B) and E)

Question 11

Which portion of the photosynthetic apparatus is involved in the oxidation or splitting of water?

Accepted Answer

A)   reaction center
B)   antenna complex
C)   P680 chlorophyll
D)   manganese cluster
E)   light-harvesting complexF) A) and D)
G) A) and C)

Question 12

Both photosystem I and II can harness light energy and split water to produce oxygen.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following contributes to the electrochemical gradient that exists across the thylakoid membrane during photosynthesis?

Accepted Answer

A)   The electron transport chain.
B)   The splitting of water to produce H+ and oxygen in the thylakoid lumen.
C)   The depletion of H+ in the stroma during NADPH production.
D)   The pumping of H+ into the thylakoid lumen by electron transport proteins.
E)   All of the choices are correct.F) C) and D)
G) B) and C)

Question 14

Organisms such as ourselves are best described as heterotrophs.

Accepted Answer

A) True 
 B)False

Question 15

All of the following are required for the Calvin cycle EXCEPT

Accepted Answer

A)   CO2.
B)   H2O.
C)   ATP.
D)   NADPH.
E)   rubisco.F) B) and E)
G) A) and E)

Question 16

Which of the following is mismatched with its location?

Accepted Answer

A)   light reaction; grana
B)   electron transport; thylakoid membrane
C)   Calvin cycle; stroma
D)   ATP synthase; intermembrane space
E)   splitting of water; thylakoid spaceF) None of the above
G) A) and E) D

Question 17

Among the different forms of electromagnetic radiation emitted by the sun, which form is visible?

Accepted Answer

A)   ultraviolet
B)   gamma rays
C)   light
D)   microwaves
E)   infraredF) A) and D)
G) A) and E)

Question 18

Which of the following is NOT a product of the light reaction?

Accepted Answer

A)   NADPH
B)   ATP
C)   oxygen
D)   carbon dioxide
E)   energy intermediatesF) B) and C)
G) C) and D)

Question 19

The most efficient plants at producing sugars under hot and arid environments maximize photorespiration.

Accepted Answer

A) True 
 B)False

Question 20

________ consume organic molecules to live.

Accepted Answer

A)   Photoautotrophs
B)   Autotrophs
C)   Hemitrophs
D)   Heterotrophs
E)   PlantsF) A) and B)
G) All of the above

Exam 8: Photosynthesis

During noncyclic electron flow of the light reaction, which molecule is the final acceptor of the high-energy electron?

Correct AnswerverifiedC

This molecule combines with CO2 to form the 3-carbon substance, 3-phosphoglycerate.

Correct AnswerverifiedC

Which is TRUE of succulent plants such as cacti or pineapple?

Correct AnswerverifiedShow Answer

Which of the following statements regarding photosystem II is FALSE?

Correct AnswerverifiedShow Answer

Which of the following has the highest photosynthetic efficiency in hot and dry environments?

Correct AnswerverifiedShow Answer

Which of the following is NOT a product of the Calvin cycle?

Correct AnswerverifiedShow Answer

Which order of events for the Calvin cycle is correct? I. Reduction II. Regeneration of the CO2 acceptor (RuBP) III. Carbon fixation

Correct AnswerverifiedShow Answer

Which of the following statements about chlorophyll is correct?

Correct AnswerverifiedShow Answer

Which of the following statements about photorespiration is INCORRECT?

Correct AnswerverifiedShow Answer

Which of the following type of organism is most likely an autotroph?

Correct AnswerverifiedShow Answer

Which portion of the photosynthetic apparatus is involved in the oxidation or splitting of water?

Correct AnswerverifiedShow Answer

Both photosystem I and II can harness light energy and split water to produce oxygen.

Correct AnswerverifiedShow Answer

Which of the following contributes to the electrochemical gradient that exists across the thylakoid membrane during photosynthesis?

Correct AnswerverifiedShow Answer

Organisms such as ourselves are best described as heterotrophs.

Correct AnswerverifiedShow Answer

All of the following are required for the Calvin cycle EXCEPT

Correct AnswerverifiedShow Answer

Which of the following is mismatched with its location?

Correct AnswerverifiedD

Among the different forms of electromagnetic radiation emitted by the sun, which form is visible?

Correct AnswerverifiedShow Answer

Which of the following is NOT a product of the light reaction?

Correct AnswerverifiedShow Answer

The most efficient plants at producing sugars under hot and arid environments maximize photorespiration.

Correct AnswerverifiedShow Answer

________ consume organic molecules to live.

Correct AnswerverifiedShow Answer

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C

This molecule combines with CO₂ to form the 3-carbon substance, 3-phosphoglycerate.

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C

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Which order of events for the Calvin cycle is correct? I. Reduction II. Regeneration of the CO₂ acceptor (RuBP) III. Carbon fixation

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D

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