Question 1

Where do the carbon atoms in glucose come from?

Accepted Answer

A)  Sunlight
B)  Carbon dioxide
C)  Water
D)  NADPH Through the process of photosynthesis, the carbons in carbon dioxide are fixed and ultimately utilized to generate glucose.Review the equation of photosynthesis in section 8.1.E) A) and B)
F) None of the above

Question 2

Visible light has a wavelength range of

Accepted Answer

A)  400-740 nanometers.
B)  200-800 nanometers.
C)  200-400 nanometers.
D)  200-740 nanometers.E) A) and B)
F) B) and D)

Question 3

Carotenoids are important to many plants because these pigments are able to

Accepted Answer

A)  remove carbon dioxide from the air.
B)  absorb wavelengths of light that neither chlorophyll a nor b can absorb.
C)  absorb water so that hydrolysis can be carried out in the chloroplasts.
D)  capture UV radiation that is harmful to the DNA in the nucleus of plant cells.E) A) and B)
F) None of the above

Question 4

As a result of the transition from daytime to nighttime, how will the relative concentrations of glyceraldehyde 3-phosphate (G3P)  and ribulose 1,5-bisphosphate (RuBP)  change in C3 plants?

Accepted Answer

A)  The concentrations of G3P and RuBP would remain the same.
B)  The concentrations of G3P and RuBP would both decrease.
C)  G3P would increase and RuBP would decrease.
D)  G3P would decrease and RuBP would increase.E) C) and D)
F) A) and D)

Question 5

In photosynthesis, carbon fixation occurs:

Accepted Answer

A)  in photosystem I
B)  in the electron transport chain
C)  in photosystem II
D)  in the Calvin cycleE) All of the above
F) A) and D)

Question 6

A tomato plant is mutated with gamma radiation.A cellular analysis reveals that ATP synthase complexes found in the thylakoid membrane are inserted backwards into the membrane.What is the most likely outcome of this error?

Accepted Answer

A)  A proton gradient will not be established in the thylakoid space in response to the activation of photosystem II
B)  The proton gradient in the thylakoid space will not be able to be used to generate ATP
C)  The thylakoid membrane will become permeable to protons as a result of this change
D)  The ATP synthase will pump protons into the stroma in this orientationE) A) and C)
F) None of the above

Question 7

In the photosystem I reaction center, light energy captured by pigment molecules is passed to a special reaction center chlorophyll a called

Accepted Answer

A)  P680.
B)  P700.
C)  chlorophyll I.
D)  chlorophyll II.E) B) and C)
F) A) and B)

Question 8

The Calvin cycle requires all of the following except

Accepted Answer

A)  carbon dioxide.
B)  oxygen.
C)  ATP.
D)  NADPH.E) All of the above
F) A) and C)

Question 9

If chlorophyll a is blocked from absorbing light, what would be the effect on the ability of the plant to do photosynthesis?

Accepted Answer

A)  The plant will have an enhanced ability to carry out light-dependent reactions
B)  The plant will have an enhanced ability to carry out light-independent reactions
C)  The plant will have a decreased ability to carry out light-dependent reactions
D)  The plant's ability to carry out photosynthesis will be unchanged, as one of the accessory pigments can fill in for chlorophyll aE) B) and C)
F) A) and D)

Question 10

If the gene encoding the enzyme rubisco is mutated such that it is non-functional, the process that would be affected is the ability to

Accepted Answer

A)  make ATP.
B)  harvest photons.
C)  fix carbon.
D)  make O2.E) None of the above
F) All of the above

Question 11

In order to generate one glucose molecule, the Calvin cycle has to turn how many times?

Accepted Answer

A)  1
B)  2
C)  3
D)  6E) A) and B)
F) B) and D)

Question 12

In the light-independent reactions, when CO2 is added to a molecule of Ribulose 1,5-bisphosphate (RuBP)  the product is

Accepted Answer

A)  citric acid.
B)  glucose.
C)  glyceraldehyde-3-phosphate.
D)  3-phosphoglycerate.E) A) and D)
F) A) and C)

Question 13

Clusters of chlorophyll and accessory pigments are called ________.

Accepted Answer

A)  the Golgi apparatus
B)  chloroplasts
C)  photosystems
D)  photosynthetic membranesE) A) and D)
F) B) and D)

Question 14

In green plants, which photosystem absorbs photons to excite electrons in the reaction center?

Accepted Answer

A)  Photosystem I
B)  Photosystem II
C)  Photosystem III
D)  Photosystem I and IIE) None of the above
F) C) and D)

Question 15

In eukaryotes, photosynthesis takes place inside the ________.

Accepted Answer

A)  chloroplasts
B)  mitochondria
C)  cytoplasm
D)  Golgi apparatusE) A) and B)
F) B) and D)

Question 16

Why is eating carrots thought to be useful for enhancing vision?

Accepted Answer

A)  High levels of chlorophyll in carrots helps with photosynthesis in the eyes.
B)  High levels of beta-carotene can lead to the production of a pigment used in vision.
C)  High levels of carotenoids in carrots can allow vertebrate eyes to perform the dark reactions.
D)  High levels of NADPH in carrots can allow vertebrate eyes to perform the light reactions. See section 8.3.In no case can vertebrates perform the reactions of photosynthesis within their own cells.E) A) and C)
F) A) and D)

Question 17

The number of glyceraldehyde-3-phosphate molecules that would be produced from 24 turns of the Calvin cycle would be

Accepted Answer

A)  6
B)  8
C)  4
D)  12E) None of the above
F) All of the above

Question 18

The light-independent reactions of photosynthesis are those that

Accepted Answer

A)  convert glucose into energy.
B)  convert chlorophylls into light energy.
C)  convert water into hydrogen and oxygen.
D)  convert CO2 into reduced molecules (sugars) .E) B) and C)
F) C) and D)

Question 19

If the Calvin cycle were to be temporarily restricted, the highest concentration of NADPH would likely be in the

Accepted Answer

A)  thylakoid space.
B)  thylakoid membrane.
C)  stroma.
D)  chloroplast outer membrane.E) All of the above
F) A) and D)

Question 20

CAM and C4 plants likely grow in what type of environment?

Accepted Answer

A)  Cool
B)  Hot and arid
C)  High altitude
D)  In water Both of these types of plants have adaptations that allow them to minimize photorespiration.As a result, they likely grow in hot, arid environments where stomata close to minimize water loss.E) B) and D)
F) A) and B)

Exam 8: Photosynthesis

Carotenoids are important to many plants because these pigments are able to

Correct AnswerverifiedShow Answer

As a result of the transition from daytime to nighttime, how will the relative concentrations of glyceraldehyde 3-phosphate (G3P) and ribulose 1,5-bisphosphate (RuBP) change in C3 plants?

Correct AnswerverifiedShow Answer

In eukaryotes, photosynthesis takes place inside the ________.

Correct AnswerverifiedShow Answer

If the gene encoding the enzyme rubisco is mutated such that it is non-functional, the process that would be affected is the ability to

Correct AnswerverifiedShow Answer

Where do the carbon atoms in glucose come from?

Correct AnswerverifiedShow Answer

In the light-independent reactions, when CO2 is added to a molecule of Ribulose 1,5-bisphosphate (RuBP) the product is

Correct AnswerverifiedShow Answer

In photosynthesis, carbon fixation occurs:

Correct AnswerverifiedShow Answer

Visible light has a wavelength range of

Correct AnswerverifiedShow Answer

The number of glyceraldehyde-3-phosphate molecules that would be produced from 24 turns of the Calvin cycle would be

Correct AnswerverifiedShow Answer

A tomato plant is mutated with gamma radiation.A cellular analysis reveals that ATP synthase complexes found in the thylakoid membrane are inserted backwards into the membrane.What is the most likely outcome of this error?

Correct AnswerverifiedShow Answer

The light-independent reactions of photosynthesis are those that

Correct AnswerverifiedShow Answer

In green plants, which photosystem absorbs photons to excite electrons in the reaction center?

Correct AnswerverifiedShow Answer

The Calvin cycle requires all of the following except

Correct AnswerverifiedShow Answer

Why is eating carrots thought to be useful for enhancing vision?

Correct AnswerverifiedShow Answer

Clusters of chlorophyll and accessory pigments are called ________.

Correct AnswerverifiedShow Answer

In order to generate one glucose molecule, the Calvin cycle has to turn how many times?

Correct AnswerverifiedShow Answer

CAM and C4 plants likely grow in what type of environment?

Correct AnswerverifiedShow Answer

If chlorophyll a is blocked from absorbing light, what would be the effect on the ability of the plant to do photosynthesis?

Correct AnswerverifiedShow Answer

If the Calvin cycle were to be temporarily restricted, the highest concentration of NADPH would likely be in the

Correct AnswerverifiedShow Answer

In the photosystem I reaction center, light energy captured by pigment molecules is passed to a special reaction center chlorophyll a called

Correct AnswerverifiedShow Answer

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In the light-independent reactions, when CO₂ is added to a molecule of Ribulose 1,5-bisphosphate (RuBP) the product is

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CAM and C₄ plants likely grow in what type of environment?

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