Question 1

In the 1800s, the summarized chemical reaction for photosynthesis was incorrect because it left out _______ as a product.

Accepted Answer

The answer of In the 1800s, the summarized chemical reaction...

Question 2

Which of the following statements concerning the Calvin cycle is false?

Accepted Answer

A)  Light energy is not required for the cycle to proceed. 
B)  CO2 is assimilated into sugars. 
C)  RuBP is regenerated. 
D)  It uses energy stored in ATP and NADPH + H+. 
E)  All of the above are false. 
A)  Light energy is not required for the cycle to proceed. 
B)  CO2 is assimilated into sugars. 
C)  RuBP is regenerated. 
D)  It uses energy stored in ATP and NADPH + H+. 
E)  All of the above are false.

Question 3

The enzyme PEP carboxylase

Accepted Answer

A)  can trap CO2 even at relatively low CO2 concentrations. 
B)  catalyzes the synthesis of RuBP. 
C)  catalyzes the synthesis of 3PG. 
D)  is found in the chloroplasts of bundle sheath cells. 
E)  couples the synthesis of ATP to the diffusion of protons. 
A)  can trap CO2 even at relatively low CO2 concentrations. 
B)  catalyzes the synthesis of RuBP. 
C)  catalyzes the synthesis of 3PG. 
D)  is found in the chloroplasts of bundle sheath cells. 
E)  couples the synthesis of ATP to the diffusion of protons.

Question 4

The enzyme ATP synthase couples the synthesis of ATP to

Accepted Answer

A)  the diffusion of protons. 
B)  the reduction of NADP+. 
C)  the excitation of chlorophyll. 
D)  the reduction of chlorophyll. 
E)  CO2 fixation. 
A)  the diffusion of protons. 
B)  the reduction of NADP+. 
C)  the excitation of chlorophyll. 
D)  the reduction of chlorophyll. 
E)  CO2 fixation.

Question 5

The precise moment when light energy is captured in chemical energy is the point at which

Accepted Answer

A)  light shines on chlorophyll. 
B)  water is hydrolyzed. 
C)  chlorophyll is oxidized. 
D)  chlorophyll is reduced. 
E)  the CO2 from air is captured in a sugar. 
A)  light shines on chlorophyll. 
B)  water is hydrolyzed. 
C)  chlorophyll is oxidized. 
D)  chlorophyll is reduced. 
E)  the CO2 from air is captured in a sugar.

Question 6

The energy to hydrolyze water comes from

Accepted Answer

A)  oxidized chlorophyll. 
B)  reduced chlorophyll. 
C)  the proton gradient. 
D)  ATP. 
E)  NADPH + H+. 
A)  oxidized chlorophyll. 
B)  reduced chlorophyll. 
C)  the proton gradient. 
D)  ATP. 
E)  NADPH + H+.

Question 7

Activities such as amino acid synthesis and active transport in plant cells are powered by

Accepted Answer

A)  the light-dependent and light-independent reactions of photosynthesis. 
B)  ATP from the light reactions of photosynthesis. 
C)  ATP from fermentation. 
D)  ATP from glycolysis and cellular respiration. 
E)  All of the above 
A)  the light-dependent and light-independent reactions of photosynthesis. 
B)  ATP from the light reactions of photosynthesis. 
C)  ATP from fermentation. 
D)  ATP from glycolysis and cellular respiration. 
E)  All of the above

Question 8

The O2 gas produced during photosynthesis is derived from

Accepted Answer

A)  CO2. 
B)  glucose. 
C)  water. 
D)  CO. 
E)  bicarbonate ions. 
A)  CO2. 
B)  glucose. 
C)  water. 
D)  CO. 
E)  bicarbonate ions.

Question 9

Which of the following statements regarding photorespiration is true?

Accepted Answer

A)  Photorespiration is a metabolically expensive pathway. 
B)  Photorespiration is avoided when CO2 levels are low. 
C)  Photorespiration increases the overall CO2 that is converted to carbohydrates. 
D)  Photorespiration increases by 75 percent the net carbon that is fixed. 
E)  Photorespiration is most common in C4 plants. 
A)  Photorespiration is a metabolically expensive pathway. 
B)  Photorespiration is avoided when CO2 levels are low. 
C)  Photorespiration increases the overall CO2 that is converted to carbohydrates. 
D)  Photorespiration increases by 75 percent the net carbon that is fixed. 
E)  Photorespiration is most common in C4 plants.

Question 10

The _______ of photosynthesis is similar to the _______ of chlorophylls.

Accepted Answer

A)  action spectrum; fluorescence spectrum 
B)  absorption spectrum; action spectrum 
C)  action spectrum; absorption spectrum 
D)  absorption spectrum; fluorescence spectrum 
E)  None of the above 
A)  action spectrum; fluorescence spectrum 
B)  absorption spectrum; action spectrum 
C)  action spectrum; absorption spectrum 
D)  absorption spectrum; fluorescence spectrum 
E)  None of the above

Question 11

In C4 plants, starch grains are found in the chloroplasts of

Accepted Answer

A)  the thylakoids. 
B)  mesophyll cells. 
C)  the intracellular space. 
D)  the stroma. 
E)  bundle sheath cells. 
A)  the thylakoids. 
B)  mesophyll cells. 
C)  the intracellular space. 
D)  the stroma. 
E)  bundle sheath cells.

Question 12

Which of the following is not a characteristic of C4 plants?

Accepted Answer

A)  C4 plants contain two different types of chloroplasts. 
B)  C4 plants contain RuBP carboxylase and PEP carboxylase. 
C)  The first product of photosynthesis in C4 plants is 3PG. 
D)  C4 plants are better adapted to hot climates than C3 plants. 
E)  C4 plants use the Calvin cycle. 
A)  C4 plants contain two different types of chloroplasts. 
B)  C4 plants contain RuBP carboxylase and PEP carboxylase. 
C)  The first product of photosynthesis in C4 plants is 3PG. 
D)  C4 plants are better adapted to hot climates than C3 plants. 
E)  C4 plants use the Calvin cycle.

Question 13

Molecules that absorb wavelengths in the visible spectrum are called _______.

Accepted Answer

The answer of Molecules that absorb wavelengths in the visible...

Question 14

The net energy outcome of cyclic photophosphorylation is

Accepted Answer

A)  ATP. 
B)  ATP and NADH. 
C)  NADPH. 
D)  ATP and NADPH. 
E)  sugar. 
A)  ATP. 
B)  ATP and NADH. 
C)  NADPH. 
D)  ATP and NADPH. 
E)  sugar.

Question 15

Photosynthesis occurs

Accepted Answer

A)  in all plant cells. 
B)  only in photosynthetic plant cells. 
C)  only in plant cells lacking mitochondria. 
D)  only in the stroma. 
E)  only in the thylakoid membrane. 
A)  in all plant cells. 
B)  only in photosynthetic plant cells. 
C)  only in plant cells lacking mitochondria. 
D)  only in the stroma. 
E)  only in the thylakoid membrane.

Question 16

Because of the properties of chlorophyll, plants need adequate _______ light to grow properly.

Accepted Answer

A)  green 
B)  blue and red 
C)  infrared 
D)  ultraviolet 
E)  blue and blue-green 
A)  green 
B)  blue and red 
C)  infrared 
D)  ultraviolet 
E)  blue and blue-green

Question 17

The Calvin cycle results in the production of

Accepted Answer

A)  glucose. 
B)  starch. 
C)  rubisco. 
D)  G3P. 
E)  ATP. 
A)  glucose. 
B)  starch. 
C)  rubisco. 
D)  G3P. 
E)  ATP.

Question 18

In both photosynthesis and respiration, _______ synthesis is coupled to the diffusion of protons across a membrane.

Accepted Answer

The answer of In both photosynthesis and respiration, _______ synthesis...

Question 19

The energy difference between an electron excited by a photon and the electron in its ground state is _______ of the photon.

Accepted Answer

A)  less than the energy 
B)  greater than the energy 
C)  equal to the energy 
D)  related to the wavelength 
E)  Both c and d 
A)  less than the energy 
B)  greater than the energy 
C)  equal to the energy 
D)  related to the wavelength 
E)  Both c and d

Question 20

If global climate change continues and CO2 levels continue to rise,

Accepted Answer

A)  C4 plants will be favored. 
B)  C3 plants will have a comparative advantage. 
C)  More rice and wheat should be grown. 
D)  Photorespiration will increase. 
E)  Both b and c 
A)  C4 plants will be favored. 
B)  C3 plants will have a comparative advantage. 
C)  More rice and wheat should be grown. 
D)  Photorespiration will increase. 
E)  Both b and c

Exam 10: Photosynthesis: Energy From Sunlight

In the 1800s, the summarized chemical reaction for photosynthesis was incorrect because it left out _______ as a product.

Which of the following statements concerning the Calvin cycle is false?

The enzyme PEP carboxylase

The enzyme ATP synthase couples the synthesis of ATP to

The precise moment when light energy is captured in chemical energy is the point at which

The energy to hydrolyze water comes from

Activities such as amino acid synthesis and active transport in plant cells are powered by

The O2 gas produced during photosynthesis is derived from

Which of the following statements regarding photorespiration is true?

The _______ of photosynthesis is similar to the _______ of chlorophylls.

In C4 plants, starch grains are found in the chloroplasts of

Which of the following is not a characteristic of C4 plants?

Molecules that absorb wavelengths in the visible spectrum are called _______.

The net energy outcome of cyclic photophosphorylation is

Photosynthesis occurs

Because of the properties of chlorophyll, plants need adequate _______ light to grow properly.

The Calvin cycle results in the production of

In both photosynthesis and respiration, _______ synthesis is coupled to the diffusion of protons across a membrane.

The energy difference between an electron excited by a photon and the electron in its ground state is _______ of the photon.

If global climate change continues and CO2 levels continue to rise,

Studying Life

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Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

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Pathways That Harvest Chemical Energy

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Filters

The O₂ gas produced during photosynthesis is derived from

The _ of photosynthesis is similar to the _ of chlorophylls.

In C₄ plants, starch grains are found in the chloroplasts of

Which of the following is not a characteristic of C₄ plants?

If global climate change continues and CO₂ levels continue to rise,