Question 1

Chloroplasts contain their own DNA,but the genes on these chromosomes only encode about 10% of the proteins required for photosynthesis.This is evidence for

Accepted Answer

A)   competition.
B)   photosynthesis.
C)   predation.
D)   parasitism.
E)   endosymbiosis.F) D) and E)
G) A) and E)

Question 2

In photosynthesis,the oxygen atoms in H2O are initially

Accepted Answer

A)   oxidized.
B)   respired.
C)   energized.
D)   reduced.
E)   broken down.F) A) and B)
G) D) and E)

Question 3

In the carbon reactions,carbon dioxide molecules are reduced by the addition of electrons carried from the light reaction by

Accepted Answer

A)   NADP+.
B)   ATP.
C)   NADPH.
D)   water.
E)   oxygen.F) C) and E)
G) All of the above

Question 4

Figuer:
Examine this image, showing an electron transport chain in photosynthesis. 
-The main organic molecule product of the carbon reactions is

Accepted Answer

A)   NADPH.
B)   a carbohydrate.
C)   carbon dioxide.
D)   ATP.
E)   oxygen.F) A) and E)
G) A) and C)

Question 5

The energy source for the process of photosynthesis is

Accepted Answer

A)   oxygen.
B)   sunlight.
C)   carbon dioxide.
D)   chlorophyll.
E)   glucose.F) C) and D)
G) A) and B)

Question 6

Before photosynthetic cells became abundant,_____ would not be widespread.

Accepted Answer

A)   heterotrophs
B)   cells using anaerobic respiration
C)   cells using aerobic respiration
D)   chemoautotrophsE) None of the above
F) A) and D)

Question 7

A plant performing photosynthesis will produce ____ and consume _____.

Accepted Answer

A)   oxygen; carbon dioxide
B)   carbon dioxide; oxygen
C)   water; carbon dioxide
D)   oxygen; water
E)   carbon dioxide; waterF) A) and E)
G) A) and B)

Question 8

When NADP+ _____ in the light cycle it is ______ forming NADPH.

Accepted Answer

A)   accepts electrons; oxidized
B)   accepts electrons; reduced
C)   donates electrons; reduced
D)   donates electrons; oxidizedE) B) and D)
F) All of the above

Question 9

The three main energetic components of sunlight are

Accepted Answer

A)   ultraviolet radiation, visible light, and infrared radiation.
B)   visible light, radio waves, and ultraviolet radiation.
C)   ultraviolet radiation, visible light, and x-rays.
D)   gamma rays, visible light, and infrared radiation.
E)   microwaves, visible light, and ultraviolet radiation.F) A) and E)
G) D) and E)

Question 10

Figuer:
Examine this image, showing an electron transport chain in photosynthesis. 
-Tiny openings in the leaf epidermis that allow air exchange in and out of the leaf are

Accepted Answer

A)   grana.
B)   thylakoid spaces.
C)   stomata.
D)   thylakoids.
E)   stroma.F) A) and C)
G) A) and D)

Question 11

Why is photorespiration more of a problem for a plant when their stomata are closed?

Accepted Answer

A)   Oxygen cannot enter the leaf, blocking normal respiration, so the plants switch to photorespiration.
B)   Oxygen, from water in photosystem I, can't leave the leaf, and competes with carbon dioxide for rubisco's active site.
C)   Water is lost when the stomata are open, and is not available to accept electrons from Photosystem I.
D)   Carbon dioxide levels increase from the light reactions, and compete with oxygen for rubisco's active site.E) C) and D)
F) A) and B)

Question 12

Which of the following is not a net product or reactant of photosynthesis?

Accepted Answer

A)   oxygen
B)   water
C)   carbon dioxide
D)   glucose
E)   ATPF) A) and D)
G) C) and D)

Question 13

When a plant encounters hot,dry conditions of stress,the

Accepted Answer

A)   stomata open, decreasing gas exchange.
B)   stomata close, decreasing gas exchange.
C)   stomata open, increasing gas exchange.
D)   stomata close, increasing gas exchange.E) A) and B)
F) B) and D)

Question 14

The carbon reactions produce ATP and NADPH.

Accepted Answer

A) True 
 B)False

Exam 5: Photosynthesis

In photosynthesis,the oxygen atoms in H₂O are initially

Correct Answer
verified

A plant performing photosynthesis will produce and consume _.

Correct Answer
verified

When a plant encounters hot,dry conditions of stress,the

Correct Answer
verified

Which of the following is not a net product or reactant of photosynthesis?

Correct Answer
verified

The three main energetic components of sunlight are

Correct Answer
verified

Figuer: Examine this image, showing an electron transport chain in photosynthesis. -The main organic molecule product of the carbon reactions is

Correct Answer
verified

The energy source for the process of photosynthesis is

Correct Answer
verified

Chloroplasts contain their own DNA,but the genes on these chromosomes only encode about 10% of the proteins required for photosynthesis.This is evidence for

Correct Answer
verified

The carbon reactions produce ATP and NADPH.

Correct Answer
verified

In the carbon reactions,carbon dioxide molecules are reduced by the addition of electrons carried from the light reaction by

Correct Answer
verified

When NADP⁺ _ in the light cycle it is __ forming NADPH.

Correct Answer
verified

Why is photorespiration more of a problem for a plant when their stomata are closed?

Correct Answer
verified

Figuer: Examine this image, showing an electron transport chain in photosynthesis. -Tiny openings in the leaf epidermis that allow air exchange in and out of the leaf are

Correct Answer
verified

Before photosynthetic cells became abundant,_____ would not be widespread.

Correct Answer
verified

Exam 5: Photosynthesis

In photosynthesis,the oxygen atoms in H2O are initially

Correct AnswerverifiedShow Answer

A plant performing photosynthesis will produce ____ and consume _____.

Correct AnswerverifiedShow Answer

When a plant encounters hot,dry conditions of stress,the

Correct AnswerverifiedShow Answer

Which of the following is not a net product or reactant of photosynthesis?

Correct AnswerverifiedShow Answer

The three main energetic components of sunlight are

Correct AnswerverifiedShow Answer

Figuer: Examine this image, showing an electron transport chain in photosynthesis. -The main organic molecule product of the carbon reactions is

Correct AnswerverifiedShow Answer

The energy source for the process of photosynthesis is

Correct AnswerverifiedShow Answer

Chloroplasts contain their own DNA,but the genes on these chromosomes only encode about 10% of the proteins required for photosynthesis.This is evidence for

Correct AnswerverifiedShow Answer

The carbon reactions produce ATP and NADPH.

Correct AnswerverifiedShow Answer

In the carbon reactions,carbon dioxide molecules are reduced by the addition of electrons carried from the light reaction by

Correct AnswerverifiedShow Answer

When NADP+ _____ in the light cycle it is ______ forming NADPH.

Correct AnswerverifiedShow Answer

Why is photorespiration more of a problem for a plant when their stomata are closed?

Correct AnswerverifiedShow Answer

Figuer: Examine this image, showing an electron transport chain in photosynthesis. -Tiny openings in the leaf epidermis that allow air exchange in and out of the leaf are

Correct AnswerverifiedShow Answer

Before photosynthetic cells became abundant,_____ would not be widespread.

Correct AnswerverifiedShow Answer

In photosynthesis,the oxygen atoms in H₂O are initially

Correct Answer
verified

A plant performing photosynthesis will produce and consume _.

Correct Answer
verified

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verified

When NADP⁺ _ in the light cycle it is __ forming NADPH.

Correct Answer
verified

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verified

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verified

Correct Answer
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