Question 1

Accessory pigments

Accepted Answer

A)  play no role in photosynthesis. 
B)  transfer energy from chlorophyll to the electron transport chain. 
C)  absorb only the red wavelengths. 
D)  allow plants to absorb visible light of intermediate wavelengths. 
E)  transfer electrons to NADP. 
A)  play no role in photosynthesis. 
B)  transfer energy from chlorophyll to the electron transport chain. 
C)  absorb only the red wavelengths. 
D)  allow plants to absorb visible light of intermediate wavelengths. 
E)  transfer electrons to NADP.

Question 2

In C4 plants, CO2 is first fixed into a compound called

Accepted Answer

A)  pyruvate. 
B)  glucose. 
C)  oxaloacetate. 
D)  ribulose bisphosphate. 
E)  3-phosphoglycerate. 
A)  pyruvate. 
B)  glucose. 
C)  oxaloacetate. 
D)  ribulose bisphosphate. 
E)  3-phosphoglycerate.

Question 3

The light-independent reactions require the products of the _______ reactions.

Accepted Answer

The answer of The light-independent reactions require the products of...

Question 4

During cyclic photophosphorylation, _______ rather than NADP+ receives the electron from ferredoxin.

Accepted Answer

Question 5

The products of noncyclic electron transport are

Accepted Answer

A)  ATP. 
B)  NADP+ and ATP. 
C)  NADPH and ATP. 
D)  NADPH, O2, and ATP. 
E)  NADP+, O2, and ATP. 
A)  ATP. 
B)  NADP+ and ATP. 
C)  NADPH and ATP. 
D)  NADPH, O2, and ATP. 
E)  NADP+, O2, and ATP.

Question 6

The main photosynthetic pigments in plants are _______ and _______.

Accepted Answer

A)  chlorophyll s; chlorophyll a 
B)  chlorophyll x; chlorophyll y 
C)  retinal pigment; accessory pigment 
D)  chlorophyll a; chlorophyll b 
E)  None of the above 
A)  chlorophyll s; chlorophyll a 
B)  chlorophyll x; chlorophyll y 
C)  retinal pigment; accessory pigment 
D)  chlorophyll a; chlorophyll b 
E)  None of the above

Question 7

The Calvin cycle was once referred to as the "dark" reactions of photosynthesis. Why is this a misnomer?

Accepted Answer

Light is required for both the

Question 8

When _______ are exposed to light and CO2, four-carbon compounds (oxaloacetate) are the first carbon-containing products.

Accepted Answer

Question 9

In cacti, CO2 is stored for use in the Calvin cycle

Accepted Answer

A)  in the stems, roots, and leaves. 
B)  during the evening. 
C)  in glucose molecules. 
D)  in the stroma. 
E)  Both a and d 
A)  in the stems, roots, and leaves. 
B)  during the evening. 
C)  in glucose molecules. 
D)  in the stroma. 
E)  Both a and d

Question 10

The Calvin-Benson cycle uses more ATP than NADPH + H+. The needed ATP comes from

Accepted Answer

A)  the splitting of water. 
B)  the reduction of oxygen. 
C)  the oxidation of glucose. 
D)  cyclic P700. 
E)  noncyclic electronic transport. 
A)  the splitting of water. 
B)  the reduction of oxygen. 
C)  the oxidation of glucose. 
D)  cyclic P700. 
E)  noncyclic electronic transport.

Question 11

Mesophyll cells of a leaf of a green plant

Accepted Answer

A)  do not contain mitochondria. 
B)  cannot carry out glycolysis. 
C)  do not respire. 
D)  have metabolic pathways that are very similar to those in animal cells, except for photosynthesis. 
E)  resemble prokaryotes. 
A)  do not contain mitochondria. 
B)  cannot carry out glycolysis. 
C)  do not respire. 
D)  have metabolic pathways that are very similar to those in animal cells, except for photosynthesis. 
E)  resemble prokaryotes.

Question 12

Chlorophyll is suited for the capture of light energy because

Accepted Answer

A)  certain wavelengths of light raise it to an excited state. 
B)  in its excited state it gives off electrons. 
C)  its structure allows it to attach to thylakoid membranes. 
D)  it can transfer absorbed energy to another molecule. 
E)  All of the above 
A)  certain wavelengths of light raise it to an excited state. 
B)  in its excited state it gives off electrons. 
C)  its structure allows it to attach to thylakoid membranes. 
D)  it can transfer absorbed energy to another molecule. 
E)  All of the above

Question 13

The Z scheme is

Accepted Answer

A)  the characteristic path of electrons when they are bounced out of the pigments of the reaction center. 
B)  another name for the splitting of water. 
C)  the addition of CO2 to RuBP to form a six-carbon sugar. 
D)  the passing of high-energy electrons through ATP synthase. 
E)  the wavelengths of light absorbed by a specific molecule. 
A)  the characteristic path of electrons when they are bounced out of the pigments of the reaction center. 
B)  another name for the splitting of water. 
C)  the addition of CO2 to RuBP to form a six-carbon sugar. 
D)  the passing of high-energy electrons through ATP synthase. 
E)  the wavelengths of light absorbed by a specific molecule.

Question 14

How is the Calvin cycle connected to the light reactions?

Accepted Answer

A)  The light-induced pH changes activate rubisco. 
B)  The light-induced electron flow changes the shape of four Calvin-cycle enzymes. 
C)  The Calvin cycle needs the ATP produced in the light reactions. 
D)  None of the above 
E)  All of the above 
A)  The light-induced pH changes activate rubisco. 
B)  The light-induced electron flow changes the shape of four Calvin-cycle enzymes. 
C)  The Calvin cycle needs the ATP produced in the light reactions. 
D)  None of the above 
E)  All of the above

Question 15

In C3 photosynthesis, NADPH is used for the

Accepted Answer

A)  reduction of O2 to water. 
B)  synthesis of ATP. 
C)  the regeneration phase of the Calvin cycle. 
D)  formation of 3-phosphoglycerate (3-PG). 
E)  reduction of 3-phosphoglycerate (3-PG). 
A)  reduction of O2 to water. 
B)  synthesis of ATP. 
C)  the regeneration phase of the Calvin cycle. 
D)  formation of 3-phosphoglycerate (3-PG). 
E)  reduction of 3-phosphoglycerate (3-PG).

Question 16

Photorespiration takes place in

Accepted Answer

A)  mitochondria, chloroplasts and peroxisomes 
B)  chloroplasts and mitochondria 
C)  C4 plants only. 
D)  the microbodies. 
E)  the cytoplasm and peroxisomes 
A)  mitochondria, chloroplasts and peroxisomes 
B)  chloroplasts and mitochondria 
C)  C4 plants only. 
D)  the microbodies. 
E)  the cytoplasm and peroxisomes

Question 17

In green plant photosynthesis, water is

Accepted Answer

A)  oxidized to oxygen gas (O2) in the light. 
B)  reduced to hydrogen gas. 
C)  used to hydrolyze ATP. 
D)  oxidized to O2 in the dark. 
E)  an electron acceptor. 
A)  oxidized to oxygen gas (O2) in the light. 
B)  reduced to hydrogen gas. 
C)  used to hydrolyze ATP. 
D)  oxidized to O2 in the dark. 
E)  an electron acceptor.

Question 18

Photosynthesis and respiration have which of the following in common?

Accepted Answer

A)  In eukaryotes, both processes reside in specialized organelles. 
B)  ATP synthesis in both processes relies on the chemiosmotic mechanism. 
C)  Both use electron transport. 
D)  Both require light. 
E)  a, b, and c 
A)  In eukaryotes, both processes reside in specialized organelles. 
B)  ATP synthesis in both processes relies on the chemiosmotic mechanism. 
C)  Both use electron transport. 
D)  Both require light. 
E)  a, b, and c

Question 19

Which statement about the Calvin cycle is not true?

Accepted Answer

A)  CO2 reacts with RuBP to form 3PG. 
B)  RuBP forms by the metabolism of 3PG. 
C)  ATP and NADPH form when 3PG is oxidized. 
D)  The concentration of 3PG rises if the light is switched off. 
E)  Rubisco catalyzes the reaction of CO2 and RuBP. 
A)  CO2 reacts with RuBP to form 3PG. 
B)  RuBP forms by the metabolism of 3PG. 
C)  ATP and NADPH form when 3PG is oxidized. 
D)  The concentration of 3PG rises if the light is switched off. 
E)  Rubisco catalyzes the reaction of CO2 and RuBP.

Question 20

During cyclic photophosphorylation, the energy of photons is converted to the chemical energy of the product, _______.

Accepted Answer

The answer of During cyclic photophosphorylation, the energy of photons...

Exam 10: Photosynthesis: Energy From Sunlight

Accessory pigments

In C4 plants, CO2 is first fixed into a compound called

The light-independent reactions require the products of the _______ reactions.

During cyclic photophosphorylation, _______ rather than NADP+ receives the electron from ferredoxin.

The products of noncyclic electron transport are

The main photosynthetic pigments in plants are _______ and _______.

The Calvin cycle was once referred to as the "dark" reactions of photosynthesis. Why is this a misnomer?

When _______ are exposed to light and CO2, four-carbon compounds (oxaloacetate) are the first carbon-containing products.

In cacti, CO2 is stored for use in the Calvin cycle

The Calvin-Benson cycle uses more ATP than NADPH + H+. The needed ATP comes from

Mesophyll cells of a leaf of a green plant

Chlorophyll is suited for the capture of light energy because

The Z scheme is

How is the Calvin cycle connected to the light reactions?

In C3 photosynthesis, NADPH is used for the

Photorespiration takes place in

In green plant photosynthesis, water is

Photosynthesis and respiration have which of the following in common?

Which statement about the Calvin cycle is not true?

During cyclic photophosphorylation, the energy of photons is converted to the chemical energy of the product, _______.

Studying Life

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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

In C₄ plants, CO₂ is first fixed into a compound called

During cyclic photophosphorylation, _______ rather than NADP⁺ receives the electron from ferredoxin.

The main photosynthetic pigments in plants are _ and _.

When _______ are exposed to light and CO₂, four-carbon compounds (oxaloacetate) are the first carbon-containing products.

In cacti, CO₂ is stored for use in the Calvin cycle

The Calvin-Benson cycle uses more ATP than NADPH + H⁺. The needed ATP comes from

In C₃ photosynthesis, NADPH is used for the