Question 1

The rise of photosynthetic organisms:

Accepted Answer

A)  decreased the concentration of oxygen in the atmosphere decreasing polar ice caps.
B)  decreased the concentration of oxygen in the atmosphere increasing polar ice caps.
C)  raised the concentration of oxygen in the atmosphere increasing polar ice caps.
D)  raised the concentration of oxygen in the atmosphere decreasing polar ice caps.E) None of the above
F) A) and D)

Question 2

Discrete packets of kinetic energy in light are called:

Accepted Answer

A)  photons.
B)  protons.
C)  electrons.
D)  lasers.
E)  grana.F) None of the above
G) All of the above

Question 3

In the carbon reaction carbon dioxide molecules are reduced by the addition of electrons carried from the light reaction by __________.

Accepted Answer

A)  ATP
B)  NADP+
C)  NADPH
D)  oxygen
E)  waterF) A) and D)
G) D) and E)

Question 4

Photosystem I and photosystem II are respectively part of:

Accepted Answer

A)  the light reactions and the carbon reactions.
B)  the light reactions only.
C)  the carbon reaction and the light reactions.
D)  the carbon reactions only.
E)  respiration.F) C) and E)
G) All of the above

Question 5

When chlorophyll a absorbs light,electrons are "excited" and ejected from the chlorophyll a molecule.

Accepted Answer

A) True 
 B)False

Question 6

A membrane studded with photosynthetic pigments in plant cells is the:

Accepted Answer

A)  granum.
B)  chloroplast.
C)  chlorophyll.
D)  thylakoids.
E)  stroma.F) C) and E)
G) B) and C)

Question 7

The sea slug Elysia chlorotica absorbs chloroplasts from the algae Vaucheria litorea as it digests the algae.This allows the sea slug to live on sunlight and carbon dioxide.This suggests that:

Accepted Answer

A)  photosynthesis can occur from proteins released from a digested chloroplast.
B)  regions of a plant outside of the chloroplast are necessary for photosynthesis.
C)  chloroplasts alone are sufficient for photosynthesis.
D)  some of the algae are not digested and are living symbiotically inside of the sea slugs.
E)  photosynthesis can occur outside of a chloroplast in algae.F) C) and E)
G) D) and E)

Question 8

The carbon reactions produce ATP and NADPH.

Accepted Answer

A) True 
 B)False

Question 9

How do C4 plants minimize photorespiration?

Accepted Answer

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

Question 10

The algae Vaucheria litorea is:

Accepted Answer

A)  a heterotrophic protist.
B)  an autotrophic protist.
C)  an autotrophic plant.
D)  a heterotrophic plant.
E)  a heterotrophic animal.F) C) and D)
G) B) and C)

Question 11

The main byproduct of photosynthesis that is released into the environment is:

Accepted Answer

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

Question 12

Herbicides may kill plants by:

Accepted Answer

A)  blocking carotenoid synthesis.
B)  blocking electron flow in photosystem II.
C)  combining electrons with oxygen creating high energy free radicals which destroy the ability of chloroplasts to function.
D)  all are correctE) A) and C)
F) B) and C)

Question 13

The three main components of sunlight are:

Accepted Answer

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

Question 14

Energy is carried from the light reaction to the carbon reaction by __________.

Accepted Answer

A)  water
B)  NADPH
C)  NADP+
D)  oxygen
E)  ATPF) A) and D)
G) None of the above

Question 15

When NADPH _____ in the carbon reactions it is ______ forming NADP+.

Accepted Answer

A)  accepts, reduced
B)  donates, oxidized
C)  accepts, oxidized
D)  donates, reducedE) None of the above
F) A) and B)

Question 16

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 O2.

Accepted Answer

A) True 
 B)False

Question 17

A plant performing photosynthesis will produce ____ and consume _____.

Accepted Answer

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

Question 18

The electrons flowing through the electron transport chains in photosynthesis come from ____ and end up being carried by _____.

Accepted Answer

A)  NADPH, oxygen
B)  oxygen, NADPH
C)  NADPH, water
D)  water, NADPH
E)  oxygen, waterF) A) and B)
G) C) and D)

Question 19

In photosynthesis,the carbon in CO2 is being _____ to form glucose.

Accepted Answer

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

Question 20

The reactant (reactants) of photosynthesis is (are) :

Accepted Answer

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

Exam 5: Photosynthesis

In photosynthesis,the carbon in CO2 is being _____ to form glucose.

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The electrons flowing through the electron transport chains in photosynthesis come from ____ and end up being carried by _____.

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A membrane studded with photosynthetic pigments in plant cells is the:

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Discrete packets of kinetic energy in light are called:

Correct AnswerverifiedShow Answer

The sea slug Elysia chlorotica absorbs chloroplasts from the algae Vaucheria litorea as it digests the algae.This allows the sea slug to live on sunlight and carbon dioxide.This suggests that:

Correct AnswerverifiedShow Answer

The reactant (reactants) of photosynthesis is (are) :

Correct AnswerverifiedShow Answer

The three main components of sunlight are:

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Photosystem I and photosystem II are respectively part of:

Correct AnswerverifiedShow Answer

The rise of photosynthetic organisms:

Correct AnswerverifiedShow Answer

When chlorophyll a absorbs light,electrons are "excited" and ejected from the chlorophyll a molecule.

Correct AnswerverifiedShow Answer

Energy is carried from the light reaction to the carbon reaction by __________.

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 O2.

Correct AnswerverifiedShow Answer

How do C4 plants minimize photorespiration?

Correct AnswerverifiedShow Answer

Herbicides may kill plants by:

Correct AnswerverifiedShow Answer

The main byproduct of photosynthesis that is released into the environment is:

Correct AnswerverifiedShow Answer

The carbon reactions produce ATP and NADPH.

Correct AnswerverifiedShow Answer

A plant performing photosynthesis will produce ____ and consume _____.

Correct AnswerverifiedShow Answer

The algae Vaucheria litorea is:

Correct AnswerverifiedShow Answer

When NADPH _____ in the carbon reactions it is ______ forming NADP+.

Correct AnswerverifiedShow Answer

In the carbon reaction carbon dioxide molecules are reduced by the addition of electrons carried from the light reaction by __________.

Correct AnswerverifiedShow Answer

In photosynthesis,the carbon in CO₂ is being _____ to form glucose.

Correct Answer
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The electrons flowing through the electron transport chains in photosynthesis come from and end up being carried by _.

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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 O₂.

Correct Answer
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How do C₄ plants minimize photorespiration?

Correct Answer
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A plant performing photosynthesis will produce and consume _.

Correct Answer
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When NADPH _ in the carbon reactions it is __ forming NADP⁺.

Correct Answer
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