Question 1

Protons flow through the ATP synthesis from the stroma into the thylakoid lumen.

Accepted Answer

A) True 
 B)False

Question 2

Chlorophyll absorbs light principally in the green wavelength.

Accepted Answer

A) True 
 B)False

Question 3

The leaf anatomy of C4 plants provides a spatial separation between the C4 pathway and the Calvin cycle.

Accepted Answer

A) True 
 B)False

Question 4

In photophosphorylation, the role of the ATP synthase complex is to provide a channel for protons to flow back into the:

Accepted Answer

A)  lumen of the thylakoid. 
B)  chloroplast stroma. 
C)  intermembrane space of the mitochondrion. 
D)  intermembrane space of the chloroplast. 
E)  cytosol. 
A)  lumen of the thylakoid. 
B)  chloroplast stroma. 
C)  intermembrane space of the mitochondrion. 
D)  intermembrane space of the chloroplast. 
E)  cytosol.

Question 5

The concentration of CO2 in the Earth's atmosphere is approximately 3 percent.

Accepted Answer

A) True 
 B)False

Question 6

Photorespiration is an energetically wasteful process that seldom occurs in nature.

Accepted Answer

A) True 
 B)False

Question 7

In the light reactions, the cytochrome b6/f complex receives electrons directly from:

Accepted Answer

A)  plastoquinol. 
B)  ferredoxin. 
C)  pheophytin 
D)  manganese. 
E)  plastocyanin. 
A)  plastoquinol. 
B)  ferredoxin. 
C)  pheophytin 
D)  manganese. 
E)  plastocyanin.

Question 8

At the reaction center of Photosystem II is P700.

Accepted Answer

A) True 
 B)False

Question 9

Accessory pigments are directly involved in the energy-transduction processes of photosynthesis.

Accepted Answer

A) True 
 B)False

Question 10

The energy of a photon of light is directly proportional to its wavelength.

Accepted Answer

A) True 
 B)False

Question 11

F. Blackman showed that:

Accepted Answer

A)  air "restored" by vegetation could support the breathing of animals. 
B)  air is "restored" only in the presence of light and only by the green parts of the plant. 
C)  photosynthesis has a light-dependent stage and a light-independent stage. 
D)  isolated chloroplasts are able to produce O2 in the absence of light. 
E)  all the substance of a plant is provided by water and not the soil. 
A)  air "restored" by vegetation could support the breathing of animals. 
B)  air is "restored" only in the presence of light and only by the green parts of the plant. 
C)  photosynthesis has a light-dependent stage and a light-independent stage. 
D)  isolated chloroplasts are able to produce O2 in the absence of light. 
E)  all the substance of a plant is provided by water and not the soil.

Question 12

Some CAM plants can keep their stomata closed night and day.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following conditions favors photorespiration?

Accepted Answer

A)  a ratio of CO2 to O2 that favors CO2 
B)  conditions that cause the stomata to open 
C)  plants growing far apart 
D)  a hot, dry environment 
E)  darkness 
A)  a ratio of CO2 to O2 that favors CO2 
B)  conditions that cause the stomata to open 
C)  plants growing far apart 
D)  a hot, dry environment 
E)  darkness

Question 14

Light is composed of particles called:

Accepted Answer

A)  electrons. 
B)  protons. 
C)  neutrons. 
D)  gamma rays. 
E)  photons. 
A)  electrons. 
B)  protons. 
C)  neutrons. 
D)  gamma rays. 
E)  photons.

Question 15

An action spectrum can be used to demonstrate the relative effectiveness of different wavelengths of light for photosynthesis.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is the very next event that occurs when a chlorophyll molecule absorbs light?

Accepted Answer

A)  The energy is released as heat. 
B)  Fluorescence occurs. 
C)  The electron is boosted to an excited state. 
D)  Resonance energy transfer occurs. 
E)  The electron is transferred to an electron transport chain. 
A)  The energy is released as heat. 
B)  Fluorescence occurs. 
C)  The electron is boosted to an excited state. 
D)  Resonance energy transfer occurs. 
E)  The electron is transferred to an electron transport chain.

Question 17

Rubisco can use ______ or CO2 as a substrate.

Accepted Answer

A)  3-phosphoglycerate 
B)  O2 
C)  glyceraldehyde 3-phosphate 
D)  serine 
E)  oxaloacetate 
A)  3-phosphoglycerate 
B)  O2 
C)  glyceraldehyde 3-phosphate 
D)  serine 
E)  oxaloacetate

Question 18

Which of the following statements about the Calvin cycle is FALSE?

Accepted Answer

A)  It requires more ATP than NADPH. 
B)  Each reaction is catalyzed by a specific enzyme. 
C)  It regenerates ribulose 1,5-bisphosphate. 
D)  It fixes CO2. 
E)  It uses ATP from noncyclic, but not cyclic, photophosphorylation. 
A)  It requires more ATP than NADPH. 
B)  Each reaction is catalyzed by a specific enzyme. 
C)  It regenerates ribulose 1,5-bisphosphate. 
D)  It fixes CO2. 
E)  It uses ATP from noncyclic, but not cyclic, photophosphorylation.

Question 19

During cyclic electron flow, electrons are transferred directly from P700 to Ao to:

Accepted Answer

A)  P700. 
B)  P680. 
C)  the photosynthetic electron transport chain. 
D)  the photosynthetic ATP synthase. 
E)  the lumen of the thylakoid. 
A)  P700. 
B)  P680. 
C)  the photosynthetic electron transport chain. 
D)  the photosynthetic ATP synthase. 
E)  the lumen of the thylakoid.

Question 20

In contrast to Photosystem I, Photosystem II is located primarily:

Accepted Answer

A)  in the chloroplast. 
B)  in the cytosol. 
C)  in grana thylakoids. 
D)  in stroma thylokoids 
E)  in the plasma membrane. 
A)  in the chloroplast. 
B)  in the cytosol. 
C)  in grana thylakoids. 
D)  in stroma thylokoids 
E)  in the plasma membrane.

Exam 7: Photosynthesis, Light, and Life

Protons flow through the ATP synthesis from the stroma into the thylakoid lumen.

Chlorophyll absorbs light principally in the green wavelength.

The leaf anatomy of C4 plants provides a spatial separation between the C4 pathway and the Calvin cycle.

In photophosphorylation, the role of the ATP synthase complex is to provide a channel for protons to flow back into the:

The concentration of CO2 in the Earth's atmosphere is approximately 3 percent.

Photorespiration is an energetically wasteful process that seldom occurs in nature.

In the light reactions, the cytochrome b6/f complex receives electrons directly from:

At the reaction center of Photosystem II is P700.

Accessory pigments are directly involved in the energy-transduction processes of photosynthesis.

The energy of a photon of light is directly proportional to its wavelength.

F. Blackman showed that:

Some CAM plants can keep their stomata closed night and day.

Which of the following conditions favors photorespiration?

Light is composed of particles called:

An action spectrum can be used to demonstrate the relative effectiveness of different wavelengths of light for photosynthesis.

Which of the following is the very next event that occurs when a chlorophyll molecule absorbs light?

Rubisco can use ______ or CO2 as a substrate.

Which of the following statements about the Calvin cycle is FALSE?

During cyclic electron flow, electrons are transferred directly from P700 to Ao to:

In contrast to Photosystem I, Photosystem II is located primarily:

Botany: an Introduction

The Molecular Composition of Plant Cells

The Plant Cell and the Cell Cycle

The Movement of Substances Into and Out of Cells

The Flow of Energy

Respiration

Sexual Reproduction and Heredity

The Chemistry of Heredity and Gene Expression

Recombinant Dna Technology, Plant Biotechnology, and Genomics

The Process of Evolution

Systematics: the Science of Biological Diversity

Prokaryotes and Viruses

Fungi

Protists: Algae and Heterotrophic Protists

Bryophytes

Seedless Vascular Plants

Gymnosperms

Introduction to the Angiosperms

Evolution of the Angiosperms

Plants and People

Early Development of the Plant Body

Cells and Tissues of the Plant Body

The Root: Structure and Development

The Shoot: Primary Structure and Development

Secondary Growth in Stems

Regulating Growth and Development: the Plant Hormones

External Factors and Plant Growth

Plant Nutrition and Soils

The Movement of Water and Solutes in Plants

The Dynamics of Communities and Ecosystems

Global Ecology

Filters

The leaf anatomy of C₄ plants provides a spatial separation between the C₄ pathway and the Calvin cycle.

The concentration of CO₂ in the Earth's atmosphere is approximately 3 percent.

In the light reactions, the cytochrome b₆/f complex receives electrons directly from:

At the reaction center of Photosystem II is P₇₀₀.

Rubisco can use ______ or CO₂ as a substrate.

During cyclic electron flow, electrons are transferred directly from P₇₀₀ to A_o to: