53) What would be a likely consequence of a mutation in plants that results in a photorespiration deficiency?
A) Photosynthetic efficiency would be reduced at low light intensities.
B) Cells would carry on the Calvin cycle at a much slower rate.
C) There would be more cellular damage from harmfu...
53 what would be a likely consequence of a mutation in plants that results in a photorespiration deficiency a photosynthetic efficiency would be reduced at low light intensities b cells would car
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CAMPBELL BIOLOGY PG 200-400
53) What would be a likely consequence of a mutation in plants that results in a
photorespiration deficiency?
A) Photosynthetic efficiency would be reduced at low light intensities.
B) Cells would carry on the Calvin cycle at a much slower rate.
C) There would be more cellular damage from harmful products of the light reactions
of photosynthesis.
D) Less oxygen would be produced by
photosynthesis. Answer: C
Bloom's Taxonomy: Application/Analysis
Section: 10.4
54) Compared to C3 plants, C4 plants .
A) can continue to fix CO2 even at lower CO2 concentrations and higher oxygen concentrations
B) have higher rates of photorespiration
C) do not use rubisco for carbon fixation
D) make a four-carbon compound, oxaloacetate, which is then delivered to the citric acid
cycle in mitochondria
Answer: A
Bloom's Taxonomy: Application/Analysis
Section: 10.4
18) Use the following figure to answer the question.
Which of the following statements is true concerning the accompanying figure?
A) It represents a C4 photosynthetic system.
B) It represents an adaptation that maximizes photorespiration.
C) It represents a C3 photosynthetic system.
D) It represents a CAM photosynthetic
system. Answer: A
Bloom's Taxonomy: Knowledge/Comprehension
Section: 10.4
19) Use the following figure to answer the question.
Referring to the accompanying figure, where would elevated concentrations of oxygen inhibit
carbon fixation reactions?
A) cell I only
B) cell II only
C) neither cell I nor cell II
D) both cell I and cell
II Answer: B
Bloom's Taxonomy: Application/Analysis
Section: 10.4
57) Which of the following statements summarizes the metabolic results of photorespiration?
A) It produces ATP and consumes oxygen and carbon dioxide.
B) It produces carbon dioxide and consumes ATP and oxygen.
C) It produces oxygen and consumes ATP and carbon dioxide.
D) It produces oxygen and ATP and consumes carbon
dioxide. Answer: B
Bloom's Taxonomy: Knowledge/Comprehension
Section: 10.4
58) Students conducted an experiment to determine the effect of light intensity on the rate of
photosynthesis. They punched 40 leaf disks from spinach leaves and used a syringe partially
filled with water to pull the gases from the leaf disks so that all leaf disks sunk to the bottom of
the syringe. Ten leaf disks from the syringe were placed in each of four cups and covered with
50 ml of the solutions as indicated below. All leaf disks were resting on the bottom of the cups
when the experiment began. The volume of liquid in each cup and the temperature of the
solutions were held constant. All cups were placed 0.5 meters from the designated light source.
A large beaker of water was placed between the light and the cups to act as a heat sink to
prevent a change in temperature. At the end of 10 minutes, the number of disks floating in each
cup was recorded.
Grams of
Wattage of Disks floating
Trial baking soda
light bulb at 10 minutes
(CO2 source)
1 0.5 25 3
2 0.5 50 5
3 0.5 75 9
4 0 75 0
Use your knowledge of the mechanism of photosynthesis and the data presented in the chart to
determine which of the statements is a correct explanation for the students' data.
A) Cup 1 had a low rate of photosynthesis because 0.5 grams of baking soda did not provide
a sufficient amount of CO2.
B) Cup 2 had the highest rate of photosynthesis because it had the highest ratio of disks
floating to wattage of light.
C) Cup 3 had the same rate of photosynthesis as Cup 1 because they had the same ratio of
disks floating to wattage of light.
D) Cup 4 had the lowest rate of photosynthesis because it had the least CO2.
Answer: D
Bloom's Taxonomy: Application/Analysis
Section: 10.1
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