Question 1

Which of the following statements regarding the relationship between photosynthesis and cellular respiration in plants is true?

Accepted Answer

A)   Photosynthesis occurs in specialized photosynthetic cells.
B)   Cellular respiration occurs in specialized respiratory cells.
C)   Cellular respiration and photosynthesis can occur in the same cell.
D)   Photosynthesis is limited to specialized plant cells and cellular respiration does not occur in plant cells.
E)   Both a and cF) C) and D)
G) A) and D)

Question 2

Plants are green because

Accepted Answer

A)   chlorophylls absorb blue and orange-red wavelengths of light and reflect green light.
B)   chloroplasts transmit green light.
C)   energized chlorophyll a emits green light.
D)   plants do not possess green pigment.
E)   chlorophylls absorb green light.F) C) and D)
G) A) and D)

Question 3

Which of the following begins the Calvin cycle that results in the entire pathway being carried out under environmental conditions?

Accepted Answer

A)   3PG is reduced to G3P using ATP and NADPH + H+.
B)   RuBP is regenerated.
C)   CO2 and RuBP join forming 3PG.
D)   G3P is converted into glucose and fructose.
E)   Any of the above; as a cycle, it can start at any point.F) C) and E)
G) B) and E)

Question 4

When CO2 is added to RuBP, the first stable product synthesized is

Accepted Answer

A)   pyruvate.
B)   ribulose 1,5-bisphosphate.
C)   3PG.
D)   ATP.
E)   glyceraldehyde 3-phosphate (G3P) .F) A) and E)
G) C) and D)

Question 5

As atmospheric CO2 rises globally, it is known there will be

Accepted Answer

A)   an increase in photosynthetic rate.
B)   an increase in temperature.
C)   an increase in rainfall.
D)   a decrease in temperature.
E)   a decrease in rainfall.F) A) and E)
G) A) and D)

Question 6

Cyclic and noncyclic electron flow are used in plants to

Accepted Answer

A)   meet the ATP demands of the Calvin cycle.
B)   produce excess NADPH + H+.
C)   synthesize proportional amounts of ATP and NADPH + H+ in the chloroplast.
D)   consume the products of the Calvin cycle.
E)   produce O2 for the atmosphere.F) C) and D)
G) A) and D)

Question 7

The level of atmospheric CO2 has varied considerably over the years. Currently, the level of atmospheric CO2

Accepted Answer

A)   is four times what is was during the time of the dinosaurs.
B)   favors C4 plants under hot conditions.
C)   has resulted in maximum CO2 fixation by rubisco.
D)   is decreasing.
E)   prevents the occurrence of photorespiration.F) A) and B)
G) D) and E)

Question 8

How many moles of CO2 must enter the Calvin-Benson cycle for the synthesis of one mole of glucose?

Accepted Answer

A)   1
B)   2
C)   3
D)   6
E)   12F) B) and C)
G) C) and E)

Question 9

The O2 found in Earth's atmosphere is generated from photosystem _______ of noncyclic photophosphorylation.

Accepted Answer

Question 10

In plants, the reactions of glycolysis occur

Accepted Answer

A)   in C3 plants only.
B)   in the mitochondria.
C)   in the chloroplasts.
D)   only in the presence of light.
E)   in the cytosol.F) D) and E)
G) B) and C)

Question 11

In C3 plants, the Calvin-Benson cycle occurs in the chloroplasts of _______ cells, whereas in C4 plants the cycle occurs in the _______ cells.

Accepted Answer

mesophyll;...

Question 12

The enzyme rubisco is found in

Accepted Answer

A)   chloroplasts.
B)   mitochondria.
C)   the cytoplasm.
D)   the nucleus.
E)   yeast.F) B) and E)
G) D) and E)

Question 13

Refer to the diagram below. The Ruben and Kamen experiments tracing isotopes of oxygen through the process of photosynthesis proved that 2 is the source of the oxygen released during photosynthesis. C)  the oxygen released by water is incorporated into glucose. D)  oxygen is needed to made rubisco. E)  NADPH is made during the Calvin cycle." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   all the oxygen gas produced during photosynthesis comes from water.
B)   CO2 is the source of the oxygen released during photosynthesis.
C)   the oxygen released by water is incorporated into glucose.
D)   oxygen is needed to made rubisco.
E)   NADPH is made during the Calvin cycle.F) B) and C)
G) None of the above

Question 14

Compared to long-wavelength photons, short-wavelength photons have

Accepted Answer

A)   an insignificant amount of energy.
B)   more energy.
C)   energy not available to plant cells.
D)   a ladder of energy.
E)   an equal amount of energy.F) None of the above
G) A) and E)

Question 15

_______ uses pipes to release CO2 around plants to research the effects of rising atmospheric CO2 on photosynthesis and plant growth.

Accepted Answer

Free-air c...

Question 16

Cyclic electron transport

Accepted Answer

A)   involves photosystem II.
B)   results in the formation of NADPH.
C)   is coupled to proton uptake into the thylakoid lumen.
D)   requires the oxidation of water.
E)   does not use the electron transport chain between the two photosystems.F) B) and E)
G) None of the above

Question 17

Which of the following biological groups is dependent on photosynthesis for its survival?

Accepted Answer

A)   Vertebrates
B)   Mammalia
C)   Fishes
D)   Plants
E)   All of the aboveF) A) and B)
G) D) and E)

Question 18

Photorespiration

Accepted Answer

A)   results in CO2 fixation.
B)   uses ATP and NADPH produced in the light reactions.
C)   generates a proton gradient.
D)   results in the synthesis of glucose.
E)   All of the aboveF) All of the above
G) C) and E)

Question 19

Rubisco has both carboxylase and oxygenase activities. These processes compete with each other. What determines which function the enzyme has? What conditions favor photorespiration? What conditions favor photosynthesis?

Accepted Answer

Whether rubisco acts as a carboxylase or...

Question 20

How does rubisco "decide" whether to act as an oxygenase or a carboxylase?

Accepted Answer

A)   Rubisco has 10 times more affinity for O2 than CO2; therefore, it favors O2 fixation.
B)   If O2 is relatively abundant, rubisco acts as a carboxylase.
C)   If O2 predominates, rubisco fixes it and the Calvin-Benson cycle occurs.
D)   Photorespiration is more likely at low temperatures.
E)   As the ratio of CO2 to O2 falls in the leaf, the reaction of rubisco with O2 is favored, and photorespiration proceeds.F) B) and E)
G) B) and D)

Exam 10: Photosynthesis: Energy From Sunlight

Refer to the diagram below. The Ruben and Kamen experiments tracing isotopes of oxygen through the process of photosynthesis proved that

Correct AnswerverifiedShow Answer

Plants are green because

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The O2 found in Earth's atmosphere is generated from photosystem _______ of noncyclic photophosphorylation.

Correct AnswerverifiedShow Answer

Which of the following biological groups is dependent on photosynthesis for its survival?

Correct AnswerverifiedShow Answer

In plants, the reactions of glycolysis occur

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The level of atmospheric CO2 has varied considerably over the years. Currently, the level of atmospheric CO2

Correct AnswerverifiedShow Answer

How does rubisco "decide" whether to act as an oxygenase or a carboxylase?

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Which of the following statements regarding the relationship between photosynthesis and cellular respiration in plants is true?

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Photorespiration

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Which of the following begins the Calvin cycle that results in the entire pathway being carried out under environmental conditions?

Correct AnswerverifiedShow Answer

How many moles of CO2 must enter the Calvin-Benson cycle for the synthesis of one mole of glucose?

Correct AnswerverifiedShow Answer

Compared to long-wavelength photons, short-wavelength photons have

Correct AnswerverifiedShow Answer

The enzyme rubisco is found in

Correct AnswerverifiedShow Answer

Cyclic electron transport

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In C3 plants, the Calvin-Benson cycle occurs in the chloroplasts of _______ cells, whereas in C4 plants the cycle occurs in the _______ cells.

Correct Answerverifiedmesophyll;...View AnswerShow Answer

When CO2 is added to RuBP, the first stable product synthesized is

Correct AnswerverifiedShow Answer

_______ uses pipes to release CO2 around plants to research the effects of rising atmospheric CO2 on photosynthesis and plant growth.

Correct AnswerverifiedFree-air c...View AnswerShow Answer

As atmospheric CO2 rises globally, it is known there will be

Correct AnswerverifiedShow Answer

Cyclic and noncyclic electron flow are used in plants to

Correct AnswerverifiedShow Answer

Rubisco has both carboxylase and oxygenase activities. These processes compete with each other. What determines which function the enzyme has? What conditions favor photorespiration? What conditions favor photosynthesis?

Correct AnswerverifiedWhether rubisco acts as a carboxylase or...View AnswerShow Answer

Correct Answer
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The O₂ found in Earth's atmosphere is generated from photosystem _______ of noncyclic photophosphorylation.

Correct Answer
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The level of atmospheric CO₂ has varied considerably over the years. Currently, the level of atmospheric CO₂

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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How many moles of CO₂ must enter the Calvin-Benson cycle for the synthesis of one mole of glucose?

Correct Answer
verified

Correct Answer
verified

Correct Answer
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In C₃ plants, the Calvin-Benson cycle occurs in the chloroplasts of _ cells, whereas in C₄ plants the cycle occurs in the _ cells.

Correct Answer
verified
mesophyll;...
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When CO₂ is added to RuBP, the first stable product synthesized is

Correct Answer
verified

_______ uses pipes to release CO₂ around plants to research the effects of rising atmospheric CO₂ on photosynthesis and plant growth.

Correct Answer
verified
Free-air c...
View Answer

As atmospheric CO₂ rises globally, it is known there will be

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Whether rubisco acts as a carboxylase or...
View Answer