Question 1

Which of the following is NOT true of chlorophyll?

Accepted Answer

A)  It absorbs light at the red and blue ends of the spectrum. 
B)  It is found in the thylakoid membrane. 
C)  It is found in mitochondria. 
D)  It reflects green wavelengths of light. 
E)  It is the main photosynthetic pigment in plants. 
A)  It absorbs light at the red and blue ends of the spectrum. 
B)  It is found in the thylakoid membrane. 
C)  It is found in mitochondria. 
D)  It reflects green wavelengths of light. 
E)  It is the main photosynthetic pigment in plants. C

Question 2

How are the light reactions and the Calvin cycle related to each other?

Accepted Answer

The light reactions produce the ATP and NADPH required to drive the Calvin cycle, which results in the synthesis of sugar (glucose).

Question 3

Photorespiration is detrimental for a plant because

Accepted Answer

A)  CO2 is synthesized. 
B)  no glucose is produced. 
C)  glucose is synthesized. 
D)  O2 is required. 
E)  RuBP is degraded. 
A)  CO2 is synthesized. 
B)  no glucose is produced. 
C)  glucose is synthesized. 
D)  O2 is required. 
E)  RuBP is degraded. B

Question 4

Before photosynthesis evolved, was rare in Earth?s atmosphere.

Accepted Answer

A)  N2 
B)  air 
C)  O2 
D)  CO2 
E)  H2O 
A)  N2 
B)  air 
C)  O2 
D)  CO2 
E)  H2O

Question 5

The role of water in photosynthesis is to

Accepted Answer

A)  maintain turgor pressure. 
B)  provide oxygen. 
C)  provide electrons. 
D)  provide H2. 
A)  maintain turgor pressure. 
B)  provide oxygen. 
C)  provide electrons. 
D)  provide H2.

Question 6

The NADPH required for carbon dioxide fixation during the Calvin cycle is formed

Accepted Answer

A)  by the hydrolysis of ATP. 
B)  by the reduction of oxygen. 
C)  only in C4 plants. 
D)  during the light reactions. 
E)  in the mitochondria. 
A)  by the hydrolysis of ATP. 
B)  by the reduction of oxygen. 
C)  only in C4 plants. 
D)  during the light reactions. 
E)  in the mitochondria.

Question 7

Where does the C4 cycle get its name?

Accepted Answer

A)  The first product in the cycle has four carbons. 
B)  Four CO2 molecules are released. 
C)  It is a four-step process. 
D)  Only four carbons are used in the cycle. 
E)  PEP is a four-carbon molecule. 
A)  The first product in the cycle has four carbons. 
B)  Four CO2 molecules are released. 
C)  It is a four-step process. 
D)  Only four carbons are used in the cycle. 
E)  PEP is a four-carbon molecule.

Question 8

Which of the following statements is TRUE regarding the light reactions?

Accepted Answer

A)  They rely on energy provided by glucose synthesis. 
B)  Oxygen is required. 
C)  Without water, the system would shut down. 
D)  Without photosystem I, photosystem II could not occur. 
E)  ATP and NADPH are needed. 
A)  They rely on energy provided by glucose synthesis. 
B)  Oxygen is required. 
C)  Without water, the system would shut down. 
D)  Without photosystem I, photosystem II could not occur. 
E)  ATP and NADPH are needed.

Question 9

In the C3 pathway, where does the carbon come from to form glucose?

Accepted Answer

A)  Enzymes 
B)  ATP and NADPH 
C)  Chlorophyll 
D)  Water 
E)  Atmospheric CO2 
A)  Enzymes 
B)  ATP and NADPH 
C)  Chlorophyll 
D)  Water 
E)  Atmospheric CO2

Question 10

A pigment that absorbs red and blue light and reflects green light is

Accepted Answer

A)  phycocyanin. 
B)  melanin. 
C)  carotenoid. 
D)  xanthophyll. 
E)  chlorophyll. 
A)  phycocyanin. 
B)  melanin. 
C)  carotenoid. 
D)  xanthophyll. 
E)  chlorophyll.

Question 11

Based on the information provided in this figure, where does the oxygen gas produced by a leaf come from?

Accepted Answer

A)  C6H12O6 
B)  H2O 
C)  NADPH 
D)  CO2 
A)  C6H12O6 
B)  H2O 
C)  NADPH 
D)  CO2

Question 12

Which of the following statements about the light reactions of photosynthesis is FALSE?

Accepted Answer

A)  The splitting of water molecules provides a source of electrons. 
B)  NADPH becomes oxidized to NADP+. 
C)  An electron transport chain is used to create a proton gradient. 
D)  Chlorophyll (and other pigments) absorbs light energy, which excites electrons. 
E)  ATP is formed. 
A)  The splitting of water molecules provides a source of electrons. 
B)  NADPH becomes oxidized to NADP+. 
C)  An electron transport chain is used to create a proton gradient. 
D)  Chlorophyll (and other pigments) absorbs light energy, which excites electrons. 
E)  ATP is formed.

Question 13

During the Calvin cycle, the combination of oxygen with RuBP rather than carbon dioxide is called_________ .

Accepted Answer

The answer of During the Calvin cycle, the combination of...

Question 14

Give the simplest chemical equation for photosynthesis. For each reactant, indicate where the plant acquires it. For each product, note during what part of photosynthesis it is produced.

Accepted Answer

The chemical equation for photosynthesis

Question 15

In the C4 pathway, what is the source of carbon?

Accepted Answer

A)  NADPH 
B)  Glucose 
C)  Water 
D)  ATP 
E)  Carbon dioxide 
A)  NADPH 
B)  Glucose 
C)  Water 
D)  ATP 
E)  Carbon dioxide

Question 16

The photosystems are involved in the light reactions of photosynthesis.

Accepted Answer

A) True 
 B)False

Question 17

NADPH is synthesized during which of the following reactions?

Accepted Answer

A)  The light reactions only 
B)  The Calvin cycle only 
C)  Both the light reactions and the Calvin cycle 
D)  Neither the light reactions nor the Calvin cycle 
A)  The light reactions only 
B)  The Calvin cycle only 
C)  Both the light reactions and the Calvin cycle 
D)  Neither the light reactions nor the Calvin cycle

Question 18

Describe the two major components of a photosystem. What is the function of each?

Accepted Answer

The light-harvesting complex absorbs lig

Question 19

Based on the information provided in this figure, what event contributes directly to the creation of a proton gradient across the thylakoid membrane?

Accepted Answer

A)  The flow of electrons through photosystem I 
B)  The creation of C6H12O6 
C)  The splitting of H2O 
D)  The flow of electrons through electron transport chain II 
E)  The creation of ATP 
A)  The flow of electrons through photosystem I 
B)  The creation of C6H12O6 
C)  The splitting of H2O 
D)  The flow of electrons through electron transport chain II 
E)  The creation of ATP

Question 20

In C3 plants, the Calvin cycle occurs in the chloroplasts of _________cells, but in C4 plants, the Calvin cycle occurs in the_________ cells.

Accepted Answer

mesophyll;

Exam 7: Capturing Solar Energy: Photosynthesis

Which of the following is NOT true of chlorophyll?

How are the light reactions and the Calvin cycle related to each other?

Photorespiration is detrimental for a plant because

Before photosynthesis evolved, was rare in Earth?s atmosphere.

The role of water in photosynthesis is to

The NADPH required for carbon dioxide fixation during the Calvin cycle is formed

Where does the C4 cycle get its name?

Which of the following statements is TRUE regarding the light reactions?

In the C3 pathway, where does the carbon come from to form glucose?

A pigment that absorbs red and blue light and reflects green light is

Based on the information provided in this figure, where does the oxygen gas produced by a leaf come from?

Which of the following statements about the light reactions of photosynthesis is FALSE?

During the Calvin cycle, the combination of oxygen with RuBP rather than carbon dioxide is called_________ .

Give the simplest chemical equation for photosynthesis. For each reactant, indicate where the plant acquires it. For each product, note during what part of photosynthesis it is produced.

In the C4 pathway, what is the source of carbon?

The photosystems are involved in the light reactions of photosynthesis.

NADPH is synthesized during which of the following reactions?

Describe the two major components of a photosystem. What is the function of each?

Based on the information provided in this figure, what event contributes directly to the creation of a proton gradient across the thylakoid membrane?

In C3 plants, the Calvin cycle occurs in the chloroplasts of _________cells, but in C4 plants, the Calvin cycle occurs in the_________ cells.

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

DNA: The Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

Filters

Where does the C₄ cycle get its name?

In the C₃ pathway, where does the carbon come from to form glucose?

In the C₄ pathway, what is the source of carbon?

In C₃ plants, the Calvin cycle occurs in the chloroplasts of _cells, but in C₄ plants, the Calvin cycle occurs in the_ cells.