Question 1

Leaves of many plants "turn" colors in the fall because:

Accepted Answer

A)  the cooler weather causes the plant to produce more of the accessory photosynthetic pigments.
B)  the chlorophyll in the leaves degrades as winter approaches.
C)  the lessening of daylight as winter approaches causes the plant to produce more of the accessory photosynthetic pigments.
D)  plants produce more chlorophyll.
E)  all are correctF) None of the above
G) D) and E)

Question 2

How do CAM plants minimize photorespiration?

Accepted Answer

A)  The light reactions and carbon reactions occur in different cells, so carbon dioxide does not come into contact with rubisco.
B)  The light reactions and carbon reactions occur in different cells, so oxygen does not come into contact with rubisco.
C)  Stomata are only opened at night, storing carbon dioxide in malate. During the day the carbon dioxide is released for photosynthesis.
D)  Stomata are only opened at night, storing oxygen in malate. During the day the oxygen is released for photosynthesis.E) C) and D)
F) B) and D)

Question 3

The energy sources needed for the light reactions and the carbon reactions respectively are:

Accepted Answer

A)  ATP and carbon dioxide.
B)  sunlight and carbon dioxide.
C)  sunlight and ATP.
D)  ATP and sunlight.
E)  Sunlight serves as the energy source for both sets of photosynthetic reactions.F) A) and C)
G) A) and D)

Question 4

C4 plants and CAM plants fix carbon only once during the photosynthetic reactions.

Accepted Answer

A) True 
 B)False

Question 5

The Calvin Cycle:

Accepted Answer

A)  is a cyclic pathway that produces three carbon molecules from CO2.
B)  is a linear pathway that produces three carbon molecules from CO2.
C)  is a cyclic pathway that produces ATP and NADPH.
D)  is a linear pathway that produces ATP and NADPH.E) B) and D)
F) A) and B)

Question 6

A nanometer is:

Accepted Answer

A)  one billion meters.
B)  one millionth of a meter.
C)  a million meters.
D)  one thousandth of a meter.
E)  one billionth of a meter.F) B) and E)
G) A) and B)

Question 7

Organisms that make their own organic compounds from inorganic substances are called:

Accepted Answer

A)  animals.
B)  animorphs.
C)  heterotrophs.
D)  autotrophs.E) A) and B)
F) C) and D)

Question 8

What will happen to the pH inside of a thylakoid that is exposed to light?

Accepted Answer

A)  It will increase
B)  It will decrease
C)  It will not changeD) A) and B)
E) A) and C)

Question 9

C4 plants and CAM plants fix carbon twice during the photosynthetic reactions.

Accepted Answer

A) True 
 B)False

Question 10

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

Accepted Answer

A)  Carbon dioxide
B)  Glucose
C)  Sunlight
D)  ATP
E)  OxygenF) B) and C)
G) C) and E)

Question 11

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

Accepted Answer

A)  donates, oxidized
B)  accepts, oxidized
C)  donates, reduced
D)  accepts, reducedE) A) and B)
F) A) and C)

Question 12

What hypothesis were the scientists testing?

Accepted Answer

A)  That some sea slug genes were present in chloroplast chromosomes
B)  That chloroplasts can function without some proteins involved in photosynthesis
C)  That the sea slugs have to continuously consume chloroplasts to replace the older ones
D)  That some chloroplast genes were present in the sea slug chromosomes
E)  That only photosystem II is necessary for photosynthesisF) B) and E)
G) C) and D)

Question 13

For most lawn grasses to grow well in hot,dry weather they must be watered so that their stomata will remain open for longer periods of time to let in CO2.

Accepted Answer

A) True 
 B)False

Question 14

Rubisco combines ribulose bisphosphate with carbon from:

Accepted Answer

A)  glucose.
B)  ATP.
C)  carbon monoxide.
D)  organic compounds.
E)  carbon dioxide.F) B) and D)
G) A) and E)

Question 15

The primary photosynthetic pigment is the orange pigment chlorophyll a.

Accepted Answer

A) True 
 B)False

Question 16

When a plant becomes dried out:

Accepted Answer

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

Question 17

The sea slug Elysia chlorotica absorbs chloroplasts from the algae Vaucheria litorea as it digests the algae.This is an example of which of the following?

Accepted Answer

A)  Mutualism
B)  Predation
C)  Parasitism
D)  Commensalism
E)  CompetitionF) A) and B)
G) A) and E)

Question 18

Examples of accessory pigments for photosynthesis are:

Accepted Answer

A)  chlorophyll b and carotenoids.
B)  chlorophyll a and carotenoids.
C)  chlorophyll a and chlorophyll b.
D)  carotenoids, chlorophyll b and chlorophyll a.
E)  mitochondria.F) A) and B)
G) None of the above

Question 19

In photosynthesis,the oxygen atoms in H2O are:

Accepted Answer

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

Question 20

If a thylakoid is placed in a basic solution ATP synthesis will occur.How is this possible?

Accepted Answer

A)  A proton gradient is created by the difference in pH
B)  An electron gradient is created by the difference in pH
C)  ATP is formed spontaneously at low pH
D)  The carbon reactions are blocked in the thylakoid at high pH
E)  ATP cannot be broken down at low pHF) A) and B)
G) A) and E)

Exam 5: Photosynthesis

C4 plants and CAM plants fix carbon only once during the photosynthetic reactions.

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A nanometer is:

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Organisms that make their own organic compounds from inorganic substances are called:

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

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What will happen to the pH inside of a thylakoid that is exposed to light?

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How do CAM plants minimize photorespiration?

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In photosynthesis,the oxygen atoms in H2O are:

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What hypothesis were the scientists testing?

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Leaves of many plants "turn" colors in the fall because:

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

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Rubisco combines ribulose bisphosphate with carbon from:

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The Calvin Cycle:

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The sea slug Elysia chlorotica absorbs chloroplasts from the algae Vaucheria litorea as it digests the algae.This is an example of which of the following?

Correct AnswerverifiedShow Answer

For most lawn grasses to grow well in hot,dry weather they must be watered so that their stomata will remain open for longer periods of time to let in CO2.

Correct AnswerverifiedShow Answer

The primary photosynthetic pigment is the orange pigment chlorophyll a.

Correct AnswerverifiedShow Answer

C4 plants and CAM plants fix carbon twice during the photosynthetic reactions.

Correct AnswerverifiedShow Answer

If a thylakoid is placed in a basic solution ATP synthesis will occur.How is this possible?

Correct AnswerverifiedShow Answer

Examples of accessory pigments for photosynthesis are:

Correct AnswerverifiedShow Answer

The energy sources needed for the light reactions and the carbon reactions respectively are:

Correct AnswerverifiedShow Answer

When a plant becomes dried out:

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C₄ plants and CAM plants fix carbon only once during the photosynthetic reactions.

Correct Answer
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In photosynthesis,the oxygen atoms in H₂O are:

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

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For most lawn grasses to grow well in hot,dry weather they must be watered so that their stomata will remain open for longer periods of time to let in CO₂.

Correct Answer
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C₄ plants and CAM plants fix carbon twice during the photosynthetic reactions.

Correct Answer
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