Question 1

Fall leaf color on deciduous trees is a result of

Accepted Answer

A)   the reduction in the production of accessory pigments.
B)   the production of more accessory pigments because of the cooler temperatures.
C)   cessation of chlorophyll production, which allows the accessory pigments to be revealed.
D)   the increased angle of the sun during the fall, which reflects more of the accessory pigments.E) None of the above
F) All of the above

Question 2

To replace fossil fuels, the world must find a way of producing fuel from renewable energy. One of the most promising fuels of the future is hydrogen, which could potentially be produced in algae using the power of sunlight. Green algae contain enzymes (hydrogenases)  that can convert hydrogen ions (H+)  and electrons to hydrogen gas (H2) . The hydrogen ions used by the hydrogenase come from

Accepted Answer

A)   water.
B)   ATP synthase.
C)   organic sugars.
D)   rubisco.
E)   ATP.F) A) and E)
G) A) and B)

Question 3

Inside the chloroplast, where are organic molecules made?

Accepted Answer

A)   On the thylakoid membrane
B)   Inside the thylakoid
C)   Between the outer and inner membranes
D)   Stroma
E)   On the cristaeF) A) and B)
G) B) and D)

Question 4

The aquatic plant Elodea is commonly used to study photosynthesis. You put some Elodea in a test tube, shine light on the plant, and count the bubbles that were released under varying conditions. Which results would you expect to see in your analysis of photosynthetic rate?

Accepted Answer

A)   the number of bubbles increase indefinitely with increased illumination
B)   as light intensity increases, the number of bubbles increase and then rapidly decrease
C)   at high light intensities, the number of bubbles increase when the temperature is increased to human body temperature (37 degrees 
C)  
D)   at low light intensities, the number of bubbles increase as temperature increases and the number of bubbles decrease as carbon dioxide concentration decreases
E)   at high light intensities, the number of bubbles increase as carbon dioxide concentration increasesF) A) and E)
G) A) and D)

Question 5

F. F. Blackman performed experiments to investigate the effects of various factors on photosynthesis. In one of his experiments, Blackman found that if light intensity was low that photosynthesis could be accelerated by increasing the amount of light, but not by increasing the temperature or carbon dioxide concentration. What can you conclude from this specific experiment?

Accepted Answer

A)   Light is important for photosynthesis
B)   Photosynthesis generates oxygen
C)   High temperatures are important for photosynthesis
D)   Carbon dioxide is important for photosynthesisE) B) and C)
F) None of the above

Question 6

Jan Baptista van Helmont did an important experiment related to photosynthesis. He weighed a small willow tree and a pot of soil. Jan then planted the tree in the pot. Over the course of five years, he added only water to the pot. At the end of five years, he weighed the tree and found that it had gained 74.4 kg. He weighed the soil, and it was only 57 g less. What do the results of this specific experiment demonstrate about what is needed for a plant to grow and increase its mass?

Accepted Answer

A)   Plants must be able to increase their mass using substances in addition to what is found in soil.
B)   Plants need oxygen to grow.
C)   All of the food a plant needs to grow comes from the soil.
D)   Plants do not need soil to grow.
E)   All of the food a plant needs to grow comes from the water.F) B) and E)
G) A) and B)

Question 7

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)   The ATP synthase will pump protons into the stroma in this orientation
B)   The proton gradient in the thylakoid space will not be able to be used to generate ATP
C)   A proton gradient will not be established in the thylakoid space in response to the activation of photosystem II
D)   The thylakoid membrane will become permeable to protons as a result of this change
E)   This change is not likely to have any effect on the function of the ATP synthase enzyme with respect to its role in photosynthesisF) A) and D)
G) B) and E) B

Question 8

In plants, production of NADPH

Accepted Answer

A)   occurs during the Calvin cycle.
B)   requires electrons originally found in water.
C)   occurs in the absence of light.
D)   requires the production of a proton gradient.E) All of the above
F) C) and D) B

Question 9

At night, the Calvin cycle in a C3 plant

Accepted Answer

A)   cannot run, as it requires light energy directly.
B)   uses a different source of carbon.
C)   runs in a different place in the plant.
D)   can still run as long as there is ATP, CO2, and NADPH present.E) B) and D)
F) All of the above

Question 10

As electrons travel from the primary electron acceptor in photosystem II, down the electron transport chain to photosystem I, they drive the movement of protons from the stroma into the thylakoid compartment. Why is the development of this chemical gradient useful to photosynthesis?

Accepted Answer

A)   The proton gradient can drive the production of ATP, which is needed for the light-independent reactions
B)   Protons are directly used in the thylakoid to make glucose
C)   This proton gradient is used to make NADPH, which is needed for the Calvin cycle
D)   Protons provide the energy needed to drive the light-dependent reactionsE) None of the above
F) B) and C)

Question 11

The ATP generated from cellular respiration is not sufficient to drive the Calvin cycle in plants, even if appropriate levels of NADPH and CO2 are present. Why not?

Accepted Answer

A)   Cellular respiration and photosynthesis do not happen in the same cells in plants.
B)   Breaking down sugar to provide the energy needed to synthesize sugar would be a futile cycle.
C)   Plants do not undergo cellular respiration.
D)   The Calvin cycle requires more ATP than can possibly be made from cellular respiration.E) All of the above
F) C) and D)

Question 12

Visible light has a wavelength range of:

Accepted Answer

A)   400-740 nanometers.
B)   200-400 nanometers.
C)   0.001-100,000 nanometers.
D)   200-800 nanometers.
E)   200-740 nanometers.F) B) and E)
G) A) and B) A

Question 13

In 1932, researchers Emerson and Arnold showed that the rate of photosynthesis saturated at a lower light intensity than expected for the number of individual chlorophyll molecules. From this observation they determined

Accepted Answer

A)   that high light intensities destroyed most pigment molecules
B)   that pigments were clustered in photosystems and they were measuring saturation of pigments in reaction centers
C)   that plants must be able to fix carbon before their pigments can absorb light
D)   that they had overestimated the number of chlorophyll molecules present in their test organismE) A) and B)
F) C) and D)

Question 14

The chloroplast is a membrane-bound organelle that is surrounded by an outer membrane. Aside from the outer membrane of the chloroplast, how many other types of membranes can be found inside the chloroplast?

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4F) A) and B)
G) B) and E)

Question 15

-Based on a variety of experiments, it is known that the rate of photosynthesis is highest when wavelengths of light between 400 and 500 nm are used, and when wavelengths around 700 nm are used. What can you infer about the relative importance of chlorophyll a and b in photosynthesis?

Accepted Answer

A)   Absorption of light by chlorophyll a and b is essential for the process of photosynthesis
B)   Reflection of light by chlorophyll a and b is essential for the process of photosynthesis
C)   Transmission of light by chlorophyll a and b is essential for the process of photosynthesis
D)   Chlorophyll a and b are much less important than other pigments in the reflection, absorption and transmission of light relevant to photosynthesisE) A) and B)
F) B) and D)

Question 16

Why may eating carrots be useful for enhancing vision?

Accepted Answer

A)   High levels of beta-carotene can lead to the production of a pigment used in vision.
B)   High levels of chlorophyll in carrots helps with photosynthesis in the eyes.
C)   High levels of NADPH in carrots can allow vertebrate eyes to perform the light reactions.
D)   High levels of carotenoids in carrots can allow vertebrate eyes to perform the dark reactions.E) A) and B)
F) A) and C)

Question 17

In photosynthesis, ATP is made by

Accepted Answer

A)   chemiosmosis.
B)   the passing of electrons from photosystem I to an electron transport chain.
C)   the Calvin cycle.
D)   the Krebs cycle.
E)   glycolysis.F) A) and E)
G) B) and C)

Question 18

Illuminated chloroplasts deprived of carbon dioxide

Accepted Answer

A)   will make glucose, but will not produce ATP or NADH.
B)   will accumulate ATP, NADPH, and not produce glucose.
C)   will not make ATP, NADH, or glucose.
D)   will not make ATP, but will make NADH and glucose.E) A) and D)
F) C) and D)

Question 19

In his 1771 experiments, Joseph Priestly determined that plants added something to the air that allow an animal to survive. What do we now know that plants contribute to the air that is essential for animals (and other organisms) ?

Accepted Answer

A)   organic sugars
B)   oxygen
C)   carbon dioxide
D)   waterE) A) and C)
F) All of the above

Question 20

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-independent reactions
B)   The plant will have a decreased ability to carry out light-dependent reactions
C)   The plant will have an enhanced 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 D)
F) B) and C)

Exam 8: Photosynthesis

Fall leaf color on deciduous trees is a result of

Correct Answer
verified

Correct Answer
verified

Inside the chloroplast, where are organic molecules made?

Correct Answer
verified

The aquatic plant Elodea is commonly used to study photosynthesis. You put some Elodea in a test tube, shine light on the plant, and count the bubbles that were released under varying conditions. Which results would you expect to see in your analysis of photosynthetic rate?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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 Answer
verified
B

In plants, production of NADPH

Correct Answer
verified
B

At night, the Calvin cycle in a C3 plant

Correct Answer
verified

As electrons travel from the primary electron acceptor in photosystem II, down the electron transport chain to photosystem I, they drive the movement of protons from the stroma into the thylakoid compartment. Why is the development of this chemical gradient useful to photosynthesis?

Correct Answer
verified

The ATP generated from cellular respiration is not sufficient to drive the Calvin cycle in plants, even if appropriate levels of NADPH and CO₂ are present. Why not?

Correct Answer
verified

Visible light has a wavelength range of:

Correct Answer
verified
A

In 1932, researchers Emerson and Arnold showed that the rate of photosynthesis saturated at a lower light intensity than expected for the number of individual chlorophyll molecules. From this observation they determined

Correct Answer
verified

The chloroplast is a membrane-bound organelle that is surrounded by an outer membrane. Aside from the outer membrane of the chloroplast, how many other types of membranes can be found inside the chloroplast?

Correct Answer
verified

-Based on a variety of experiments, it is known that the rate of photosynthesis is highest when wavelengths of light between 400 and 500 nm are used, and when wavelengths around 700 nm are used. What can you infer about the relative importance of chlorophyll a and b in photosynthesis?

Correct Answer
verified

Why may eating carrots be useful for enhancing vision?

Correct Answer
verified

In photosynthesis, ATP is made by

Correct Answer
verified

Illuminated chloroplasts deprived of carbon dioxide

Correct Answer
verified

In his 1771 experiments, Joseph Priestly determined that plants added something to the air that allow an animal to survive. What do we now know that plants contribute to the air that is essential for animals (and other organisms) ?

Correct Answer
verified

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

Correct Answer
verified

Exam 8: Photosynthesis

Fall leaf color on deciduous trees is a result of

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Inside the chloroplast, where are organic molecules made?

Correct AnswerverifiedShow Answer

The aquatic plant Elodea is commonly used to study photosynthesis. You put some Elodea in a test tube, shine light on the plant, and count the bubbles that were released under varying conditions. Which results would you expect to see in your analysis of photosynthetic rate?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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 AnswerverifiedB

In plants, production of NADPH

Correct AnswerverifiedB

At night, the Calvin cycle in a C3 plant

Correct AnswerverifiedShow Answer

As electrons travel from the primary electron acceptor in photosystem II, down the electron transport chain to photosystem I, they drive the movement of protons from the stroma into the thylakoid compartment. Why is the development of this chemical gradient useful to photosynthesis?

Correct AnswerverifiedShow Answer

The ATP generated from cellular respiration is not sufficient to drive the Calvin cycle in plants, even if appropriate levels of NADPH and CO2 are present. Why not?

Correct AnswerverifiedShow Answer

Visible light has a wavelength range of:

Correct AnswerverifiedA

In 1932, researchers Emerson and Arnold showed that the rate of photosynthesis saturated at a lower light intensity than expected for the number of individual chlorophyll molecules. From this observation they determined

Correct AnswerverifiedShow Answer

The chloroplast is a membrane-bound organelle that is surrounded by an outer membrane. Aside from the outer membrane of the chloroplast, how many other types of membranes can be found inside the chloroplast?

Correct AnswerverifiedShow Answer

-Based on a variety of experiments, it is known that the rate of photosynthesis is highest when wavelengths of light between 400 and 500 nm are used, and when wavelengths around 700 nm are used. What can you infer about the relative importance of chlorophyll a and b in photosynthesis?

Correct AnswerverifiedShow Answer

Why may eating carrots be useful for enhancing vision?

Correct AnswerverifiedShow Answer

In photosynthesis, ATP is made by

Correct AnswerverifiedShow Answer

Illuminated chloroplasts deprived of carbon dioxide

Correct AnswerverifiedShow Answer

In his 1771 experiments, Joseph Priestly determined that plants added something to the air that allow an animal to survive. What do we now know that plants contribute to the air that is essential for animals (and other organisms) ?

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

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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B

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B

Correct Answer
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Correct Answer
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The ATP generated from cellular respiration is not sufficient to drive the Calvin cycle in plants, even if appropriate levels of NADPH and CO₂ are present. Why not?

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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