Question 1

Hydrogen ions cross the thylakoid membranes from the stroma by:

Accepted Answer

A) osmosis. 
B) facilitated diffusion. 
C) active transport. 
D) simple diffusion. 
E) synthesis. 
A) osmosis. 
B) facilitated diffusion. 
C) active transport. 
D) simple diffusion. 
E) synthesis.

Question 2

Some plants, called the ________ plants, have evolved a way to reduce photorespiration.

Accepted Answer

The answer of Some plants, called the ________ plants, have...

Question 3

Imagine that, similar to events that occurred 65 million years ago, a huge meteorite were to hit Earth tomorrow, spewing cloudy debris into the atmosphere and blocking a large proportion of sunlight. Because plants rely on sunlight, global rates of photosynthesis would be greatly reduced, and many of the animals that depend on photosynthetic plants (such as herbivores and the predators that fed on those herbivores)would starve or go extinct.
In this scenario, why can't the plants continue to produce sugars and survive if the sugar-producing reactions in photosynthesis are considered "light independent"?

Accepted Answer

The Calvin cycle, used to driv

Question 4

The energy of the movement of electrons down a concentration gradient via electron transport within chloroplasts and mitochondria is used to generate molecules of:

Accepted Answer

A) H2O. 
B) CO2. 
C) glucose. 
D) ATP. 
E) O2. 
A) H2O. 
B) CO2. 
C) glucose. 
D) ATP. 
E) O2.

Question 5

Which of the following occurs during the Calvin cycle of photosynthesis?

Accepted Answer

A) Water is converted to its most basic elements, hydrogen and water. 
B) Carbon dioxide is converted to chemicals that can be used to make sugars. 
C) Chlorophyll acts as an enzyme, but only in the dark. 
D) Nothing occurs because the plant rests in the dark. 
A) Water is converted to its most basic elements, hydrogen and water. 
B) Carbon dioxide is converted to chemicals that can be used to make sugars. 
C) Chlorophyll acts as an enzyme, but only in the dark. 
D) Nothing occurs because the plant rests in the dark.

Question 6

Where does the C4 cycle get its name?

Accepted Answer

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

Question 7

The primary function of the light reactions of photosynthesis is to:

Accepted Answer

A) produce energy-rich glucose from carbon dioxide and water. 
B) produce energy-rich ATP and NADPH. 
C) produce NADPH used in respiration. 
D) convert light energy to the chemical energy of lipids. 
E) use ATP to make glucose. 
A) produce energy-rich glucose from carbon dioxide and water. 
B) produce energy-rich ATP and NADPH. 
C) produce NADPH used in respiration. 
D) convert light energy to the chemical energy of lipids. 
E) use ATP to make glucose.

Question 8

You are carrying out an experiment on several aquatic plants in your fish tank. You decide to expose two of the plants to green light and two to blue light. You want to determine which type of light is best for the light reactions, so you decide to record the amount of oxygen bubbles produced to reach your conclusions. Which of the following results would be expected?

Accepted Answer

A) There would be more bubbles from the plants in green light than from those in blue light. 
B) There would be more bubbles from the plants in blue light than from those in green light. 
C) There would be the same number of bubbles from plants in blue or green light. 
D) No bubbles would be produced in either green light or blue light. 
A) There would be more bubbles from the plants in green light than from those in blue light. 
B) There would be more bubbles from the plants in blue light than from those in green light. 
C) There would be the same number of bubbles from plants in blue or green light. 
D) No bubbles would be produced in either green light or blue light.

Question 9

Which of the following is NOT true of chlorophyll?

Accepted Answer

A) It is green in reflected color. 
B) It absorbs light at the red and blue ends of the spectrum. 
C) It is the main photosynthetic pigment in plants. 
D) It is found in mitochondria. 
E) It does not absorb green wavelengths of light. 
A) It is green in reflected color. 
B) It absorbs light at the red and blue ends of the spectrum. 
C) It is the main photosynthetic pigment in plants. 
D) It is found in mitochondria. 
E) It does not absorb green wavelengths of light.

Question 10

Specifically, molecules of chlorophyll are located in the membranes of sacs called:

Accepted Answer

A) stoma. 
B) thylakoids. 
C) stroma. 
D) grana. 
E) vesicles. 
A) stoma. 
B) thylakoids. 
C) stroma. 
D) grana. 
E) vesicles.

Question 11

The stacked thylakoids are disk-shaped, interconnected membranous sacs embedded in the stroma. True or False?

Accepted Answer

A) True 
 B)False

Question 12

What is produced in the electron transport system associated with photosystem II?

Accepted Answer

A) NADPH 
B) ATP 
C) glucose 
D) O2 
E) CO2 
A) NADPH 
B) ATP 
C) glucose 
D) O2 
E) CO2

Question 13

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

Question 14

Imagine that a plant in your garden doesn't receive an adequate amount of water. Which of the following would be most affected by this?

Accepted Answer

A) the light reactions of photosynthesis only 
B) the Calvin cycle of photosynthesis only 
C) both the light reactions and the Calvin cycle of photosynthesis 
D) neither the light reactions nor the Calvin cycle of photosynthesis 
A) the light reactions of photosynthesis only 
B) the Calvin cycle of photosynthesis only 
C) both the light reactions and the Calvin cycle of photosynthesis 
D) neither the light reactions nor the Calvin cycle of photosynthesis

Question 15

Imagine that a scientist discovers a mutant plant seedling that appears to lack stomata. What would be the effect of this?

Accepted Answer

A) CO2 would not be able to enter the plant as a reactant for photosynthesis. 
B) Water would not be able to enter the plant cells. 
C) Visible wavelengths of light would be unable to reach the chloroplasts. 
D) Additional ATP would be produced by the seedling, and the plant would grow taller. 
A) CO2 would not be able to enter the plant as a reactant for photosynthesis. 
B) Water would not be able to enter the plant cells. 
C) Visible wavelengths of light would be unable to reach the chloroplasts. 
D) Additional ATP would be produced by the seedling, and the plant would grow taller.

Question 16

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 17

Light reactions produce:

Accepted Answer

A) ATP, NADPH, and O2. 
B) ATP, NADPH, and CO2. 
C) glucose, ATP, and O2. 
D) glucose, ATP, and CO2. 
E) ATP, NADPH, and H2O. 
A) ATP, NADPH, and O2. 
B) ATP, NADPH, and CO2. 
C) glucose, ATP, and O2. 
D) glucose, ATP, and CO2. 
E) ATP, NADPH, and H2O.

Question 18

What is photorespiration? Describe how C4 plants have evolved the ability to reduce photorespiration.

Accepted Answer

Photorespiration occurs when RuBP combin

Question 19

In green plants, the primary function of the Calvin cycle is to:

Accepted Answer

A) use ATP to release carbon dioxide. 
B) use NADPH to release carbon dioxide. 
C) split water and release oxygen. 
D) transport glucose out of the chloroplast. 
E) construct the building blocks of simple sugars from carbon dioxide. 
A) use ATP to release carbon dioxide. 
B) use NADPH to release carbon dioxide. 
C) split water and release oxygen. 
D) transport glucose out of the chloroplast. 
E) construct the building blocks of simple sugars from carbon dioxide.

Question 20

The pigment(s)that absorb light energy to drive photosynthesis is/are:

Accepted Answer

A) chlorophyll only. 
B) carotenoids only. 
C) anthocyanins only. 
D) chlorophyll and carotenoids. 
E) carotenoids and anthocyanins. 
A) chlorophyll only. 
B) carotenoids only. 
C) anthocyanins only. 
D) chlorophyll and carotenoids. 
E) carotenoids and anthocyanins.

Exam 7: Capturing Solar Energy: Photosynthesis

Hydrogen ions cross the thylakoid membranes from the stroma by:

Some plants, called the ________ plants, have evolved a way to reduce photorespiration.

The energy of the movement of electrons down a concentration gradient via electron transport within chloroplasts and mitochondria is used to generate molecules of:

Which of the following occurs during the Calvin cycle of photosynthesis?

Where does the C4 cycle get its name?

The primary function of the light reactions of photosynthesis is to:

Which of the following is NOT true of chlorophyll?

Specifically, molecules of chlorophyll are located in the membranes of sacs called:

The stacked thylakoids are disk-shaped, interconnected membranous sacs embedded in the stroma. True or False?

What is produced in the electron transport system associated with photosystem II?

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

Imagine that a plant in your garden doesn't receive an adequate amount of water. Which of the following would be most affected by this?

Imagine that a scientist discovers a mutant plant seedling that appears to lack stomata. What would be the effect of this?

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.

Light reactions produce:

What is photorespiration? Describe how C4 plants have evolved the ability to reduce photorespiration.

In green plants, the primary function of the Calvin cycle is to:

The pigment(s)that absorb light energy to drive photosynthesis is/are:

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

The Continuity of Life: Cellular 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 Amidst 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

How Do Ecosystems Work

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

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