Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

Chlorophyll absorbs light principally in the green wavelength.

Accepted Answer

A) True 
 B)False

Question 3

Most of the glyceraldehyde 3-phosphate not exported to the cytosol is converted to ______ and stored in the chloroplasts.

Accepted Answer

A) 3-phosphoglycerate 
B) sucrose 
C) glucose 
D) starch 
E) ribulose 1,5-bisphosphate 
A) 3-phosphoglycerate 
B) sucrose 
C) glucose 
D) starch 
E) ribulose 1,5-bisphosphate

Question 4

In CAM plants, malate formed as the end product of CO2 fixation in the dark is stored as malic acid in the:

Accepted Answer

A) vacuole. 
B) chloroplast stroma. 
C) thylakoid lumen. 
D) cytosol. 
E) nucleus. 
A) vacuole. 
B) chloroplast stroma. 
C) thylakoid lumen. 
D) cytosol. 
E) nucleus.

Question 5

Chlorophyll absorbs light principally in the ______ wavelengths.

Accepted Answer

A) blue and green 
B) green and violet 
C) blue and violet 
D) violet and green 
E) green and red 
A) blue and green 
B) green and violet 
C) blue and violet 
D) violet and green 
E) green and red

Question 6

Which of the following statements about the electromagnetic spectrum is FALSE?

Accepted Answer

A) All radiations travel in waves. 
B) White light consists of a number of different colors. 
C) Different colors of light are refracted at different angles. 
D) A wavelength is the distance from one wave crest to the crest of another. 
E) The longer the wavelength of light, the more energy it has. 
A) All radiations travel in waves. 
B) White light consists of a number of different colors. 
C) Different colors of light are refracted at different angles. 
D) A wavelength is the distance from one wave crest to the crest of another. 
E) The longer the wavelength of light, the more energy it has.

Question 7

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 8

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 9

B.van Neil's experiments provided evidence that water, not carbon dioxide, was the source of the oxygen in photosynthesis.

Accepted Answer

A) True 
 B)False

Question 10

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 11

An action spectrum is different from an absorption spectrum in that an action spectrum:

Accepted Answer

A) provides evidence that a particular pigment is responsible for a particular process. 
B) provides information about the extent of reflectance. 
C) is the light-transmitting pattern of a pigment. 
D) is the light-absorbing pattern of a pigment. 
E) is the relative effectiveness of different wavelengths for a specific process. 
A) provides evidence that a particular pigment is responsible for a particular process. 
B) provides information about the extent of reflectance. 
C) is the light-transmitting pattern of a pigment. 
D) is the light-absorbing pattern of a pigment. 
E) is the relative effectiveness of different wavelengths for a specific process.

Question 12

Which of the following is not considered a CAM plant?

Accepted Answer

A) cactus 
B) pineapple 
C) Spanish "moss" 
D) Welwitschia 
E) wheat 
A) cactus 
B) pineapple 
C) Spanish "moss" 
D) Welwitschia 
E) wheat

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

In Photosystem II, pheophytin passes an electron directly to plastoquinone.

Accepted Answer

A) True 
 B)False

Question 15

All photosynthetic eukaryotes contain both chlorophylls a and b.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is most likely to occur in a leaf cell of a CAM plant during the day?

Accepted Answer

A) entry of CO2 through stomata 
B) exit of water through stomata 
C) decarboxylation of malic acid 
D) fixation of CO2 by PEP carboxylase 
E) conversion of oxaloacetate to malate 
A) entry of CO2 through stomata 
B) exit of water through stomata 
C) decarboxylation of malic acid 
D) fixation of CO2 by PEP carboxylase 
E) conversion of oxaloacetate to malate

Question 17

Which of the following does NOT occur in the Calvin cycle?

Accepted Answer

A) ATP is hydrolyzed. 
B) ADP is phosphorylated to ATP. 
C) NADPH is oxidized. 
D) Ribulose 1,5-bisphosphate is regenerated. 
E) CO2 is fixed. 
A) ATP is hydrolyzed. 
B) ADP is phosphorylated to ATP. 
C) NADPH is oxidized. 
D) Ribulose 1,5-bisphosphate is regenerated. 
E) CO2 is fixed.

Question 18

Which of the following statements concerning ferredoxin is FALSE?

Accepted Answer

A) It is the final electron acceptor of Photosystem I. 
B) It is found in the chloroplast grana. 
C) It transfers electrons to NADP+. 
D) It is an iron-sulfur protein. 
E) It is a mobile protein. 
A) It is the final electron acceptor of Photosystem I. 
B) It is found in the chloroplast grana. 
C) It transfers electrons to NADP+. 
D) It is an iron-sulfur protein. 
E) It is a mobile protein.

Question 19

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 20

Which of the following events is NOT associated with Photosystem I?

Accepted Answer

A) absorption of light by antenna molecules 
B) excitation of an electron from P700 
C) transfer of electrons from cytochromes to iron-sulfur proteins 
D) reduction of NADP+ 
E) reduction of Ao 
A) absorption of light by antenna molecules 
B) excitation of an electron from P700 
C) transfer of electrons from cytochromes to iron-sulfur proteins 
D) reduction of NADP+ 
E) reduction of Ao

Exam 7: Photosynthesis, Light, and Life

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

Chlorophyll absorbs light principally in the green wavelength.

Most of the glyceraldehyde 3-phosphate not exported to the cytosol is converted to ______ and stored in the chloroplasts.

In CAM plants, malate formed as the end product of CO2 fixation in the dark is stored as malic acid in the:

Chlorophyll absorbs light principally in the ______ wavelengths.

Which of the following statements about the electromagnetic spectrum is FALSE?

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

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

B.van Neil's experiments provided evidence that water, not carbon dioxide, was the source of the oxygen in photosynthesis.

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

An action spectrum is different from an absorption spectrum in that an action spectrum:

Which of the following is not considered a CAM plant?

Which of the following conditions favors photorespiration?

In Photosystem II, pheophytin passes an electron directly to plastoquinone.

All photosynthetic eukaryotes contain both chlorophylls a and b.

Which of the following is most likely to occur in a leaf cell of a CAM plant during the day?

Which of the following does NOT occur in the Calvin cycle?

Which of the following statements concerning ferredoxin is FALSE?

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

Which of the following events is NOT associated with Photosystem I?

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

In CAM plants, malate formed as the end product of CO₂ fixation in the dark is stored as malic acid in the:

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

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