Question 1

In most green plants, chloroplasts are

Accepted Answer

A)  concentrated in a zone of leaf tissue called the mesophyll. 
B)  concentrated in a portion of the leaf called the stroma. 
C)  evenly distributed throughout the leaf tissue. 
D)  evenly distributed throughout the entire plant. 
A)  concentrated in a zone of leaf tissue called the mesophyll. 
B)  concentrated in a portion of the leaf called the stroma. 
C)  evenly distributed throughout the leaf tissue. 
D)  evenly distributed throughout the entire plant.

Question 2

Which of the following statements about the absorption of photons by pigment molecules is true?

Accepted Answer

A)  It takes several minutes for the pigment electrons to become excited. 
B)  Photons raise electrons in pigments to the ground state. 
C)  Excitation of the electrons is a very stable state. 
D)  Energy can be released by the excited electron as heat, light, or fluorescence. 
A)  It takes several minutes for the pigment electrons to become excited. 
B)  Photons raise electrons in pigments to the ground state. 
C)  Excitation of the electrons is a very stable state. 
D)  Energy can be released by the excited electron as heat, light, or fluorescence.

Question 3

The electrons lost from the reaction center of photosystem I are replaced by electrons from

Accepted Answer

A)  CO2. 
B)  H2O. 
C)  ATP. 
D)  photosystem II. 
A)  CO2. 
B)  H2O. 
C)  ATP. 
D)  photosystem II.

Question 4

You're conducting an experiment to determine the effect of different wavelengths of light on the absorption of carbon dioxide as an indicator of the rate of photosynthesis in aquatic ecosystems. If the rate of photosynthesis increases, the amount of carbon dioxide in the environment will decrease, and vice versa. Small aquatic plants are placed into three containers of water mixed with carbon dioxide. Container A is placed under normal sunlight, B under green light, and C under red light. The containers are observed for a 24-hour period.
-Based on your knowledge of the process of photosynthesis, the plant in the container placed under red light would probably

Accepted Answer

A)  absorb no CO2. 
B)  absorb the same amount of CO2 as the plants under the green light. 
C)  absorb less CO2 than the plants under the green light. 
D)  absorb more CO2 than the plants under the green light. 
A)  absorb no CO2. 
B)  absorb the same amount of CO2 as the plants under the green light. 
C)  absorb less CO2 than the plants under the green light. 
D)  absorb more CO2 than the plants under the green light.

Question 5

Which of the following statements about the greenhouse effect is true?

Accepted Answer

A)  The greenhouse effect is reduced by deforestation. 
B)  The greenhouse effect is exacerbated by the use of fossil fuels. 
C)  The greenhouse effect will decrease the average temperature of the planet. 
D)  The greenhouse effect decreases plant growth. 
A)  The greenhouse effect is reduced by deforestation. 
B)  The greenhouse effect is exacerbated by the use of fossil fuels. 
C)  The greenhouse effect will decrease the average temperature of the planet. 
D)  The greenhouse effect decreases plant growth.

Question 6

The graph shows records of temperature (light gray line) and COS1U1B12S1U1B0 (dark gray line) over the past 1,000 years. COS1U1B12S1U1B0 is recorded in parts per million (ppm).
-If the trends shown in the graph continue, how might this affect photosynthesis?

Accepted Answer

A)  Photorespiration may increase, leading to an increase in photosynthetic production of sugar. 
B)  Photorespiration may increase, leading to a decrease in photosynthetic production of sugar. 
C)  C4 and CAM plants would be unable to photosynthesize. 
D)  There would be no effect on photorespiration, since CO2 and temperature are stable. 
A)  Photorespiration may increase, leading to an increase in photosynthetic production of sugar. 
B)  Photorespiration may increase, leading to a decrease in photosynthetic production of sugar. 
C)  C4 and CAM plants would be unable to photosynthesize. 
D)  There would be no effect on photorespiration, since CO2 and temperature are stable.

Question 7

Plants use sugars as a

Accepted Answer

A)  fuel for photosynthesis. 
B)  starting material for the Calvin cycle. 
C)  source of electrons for chemiosmosis. 
D)  fuel for cellular respiration and a starting material for making other organic molecules. 
A)  fuel for photosynthesis. 
B)  starting material for the Calvin cycle. 
C)  source of electrons for chemiosmosis. 
D)  fuel for cellular respiration and a starting material for making other organic molecules.

Question 8

As a result of the cascade of electrons moving down the electron transport chain and leaving the light reactions

Accepted Answer

A)  NADPH is reduced to NADP+. 
B)  NADPH is oxidized to NADP+. 
C)  NADP+ is reduced to NADPH. 
D)  NADP+ is oxidized to NADPH. 
A)  NADPH is reduced to NADP+. 
B)  NADPH is oxidized to NADP+. 
C)  NADP+ is reduced to NADPH. 
D)  NADP+ is oxidized to NADPH.

Question 9

Photophosphorylation during photosynthesis differs from oxidative phosphorylation during cellular respiration in that

Accepted Answer

A)  it involves an electron transport chain. 
B)  energy is stored in the form of a proton (H+) concentration difference. 
C)  generation of ATP is driven by a flow of protons (H+) through ATP synthase. 
D)  the final electron acceptor is NADP+ and not oxygen. 
A)  it involves an electron transport chain. 
B)  energy is stored in the form of a proton (H+) concentration difference. 
C)  generation of ATP is driven by a flow of protons (H+) through ATP synthase. 
D)  the final electron acceptor is NADP+ and not oxygen.

Question 10

Photosystem II

Accepted Answer

A)  receives electrons from photosystem I. 
B)  passes electrons to photosystem I. 
C)  does not have a reaction center. 
D)  releases CO2 as a by-product. 
A)  receives electrons from photosystem I. 
B)  passes electrons to photosystem I. 
C)  does not have a reaction center. 
D)  releases CO2 as a by-product.

Question 11

________ cells in leaves are specialized for photosynthesis.

Accepted Answer

A)  Stomata 
B)  Mesophyll 
C)  Vein 
A)  Stomata 
B)  Mesophyll 
C)  Vein

Question 12

The full range of electromagnetic energy is called the ________ spectrum.

Accepted Answer

A)  visible 
B)  electromagnetic 
C)  energy 
D)  ultraviolet 
A)  visible 
B)  electromagnetic 
C)  energy 
D)  ultraviolet

Question 13

Where is chlorophyll found in a plant cell?

Accepted Answer

A)  stroma 
B)  thylakoid membranes 
C)  cytoplasm 
D)  cristae 
A)  stroma 
B)  thylakoid membranes 
C)  cytoplasm 
D)  cristae

Question 14

Which of the following are produced during the light reactions of photosynthesis?

Accepted Answer

A)  glucose, ADP, NADP+ 
B)  glucose, ADP, NADP+, CO2 
C)  ADP, NADP+, O2 
D)  ATP, NADPH, O2 
A)  glucose, ADP, NADP+ 
B)  glucose, ADP, NADP+, CO2 
C)  ADP, NADP+, O2 
D)  ATP, NADPH, O2

Question 15

Which of the following is the best summary of the process of photosynthesis?

Accepted Answer

A)  Plants turn sunlight into sugars. 
B)  The majority of the mass of plant-made sugars comes from water and nutrients from the soil. 
C)  The majority of the mass of plant-made sugars comes from the atmosphere. 
D)  Plants make sugars by breaking down other organic molecules and using those components to make sugars. 
A)  Plants turn sunlight into sugars. 
B)  The majority of the mass of plant-made sugars comes from water and nutrients from the soil. 
C)  The majority of the mass of plant-made sugars comes from the atmosphere. 
D)  Plants make sugars by breaking down other organic molecules and using those components to make sugars.

Question 16

The electrons lost from the reaction center of photosystem II are replaced by electrons from

Accepted Answer

A)  CO2. 
B)  ATP. 
C)  H2O. 
D)  photosystem I. 
A)  CO2. 
B)  ATP. 
C)  H2O. 
D)  photosystem I.

Question 17

The energy that excites the photosystems is supplied by

Accepted Answer

A)  electrons passing down the electron transport chain. 
B)  ATP. 
C)  photons. 
D)  NADPH. 
A)  electrons passing down the electron transport chain. 
B)  ATP. 
C)  photons. 
D)  NADPH.

Question 18

Put the following steps of the Calvin cycle in the correct order: 1. carbon fixation
2) regeneration of RuBP
3) release of G3P
4) reduction

Accepted Answer

A)  1, 2, 3, 4 
B)  1, 3, 4, 2 
C)  1, 4, 3, 2 
D)  4, 1, 2, 3 
A)  1, 2, 3, 4 
B)  1, 3, 4, 2 
C)  1, 4, 3, 2 
D)  4, 1, 2, 3

Question 19

The Calvin cycle constructs ________, an energy-rich molecule that a plant cell can then use to make glucose or other organic molecules.

Accepted Answer

A)  G3P 
B)  ATP 
C)  NADH 
D)  carbon dioxide 
A)  G3P 
B)  ATP 
C)  NADH 
D)  carbon dioxide

Question 20

An electron transport chain of the light reactions

Accepted Answer

A)  is located in the stroma. 
B)  shuttles electrons from photosystem II to photosystem I. 
C)  provides energy for the citric acid cycle. 
D)  is found on the plasma membrane of mesophyll cells. 
A)  is located in the stroma. 
B)  shuttles electrons from photosystem II to photosystem I. 
C)  provides energy for the citric acid cycle. 
D)  is found on the plasma membrane of mesophyll cells.

Exam 7: Photosynthesis: Using Light to Make Food

In most green plants, chloroplasts are

Which of the following statements about the absorption of photons by pigment molecules is true?

The electrons lost from the reaction center of photosystem I are replaced by electrons from

Which of the following statements about the greenhouse effect is true?

The graph shows records of temperature (light gray line) and CO2 (dark gray line) over the past 1,000 years. CO2 is recorded in parts per million (ppm). -If the trends shown in the graph continue, how might this affect photosynthesis?

Plants use sugars as a

As a result of the cascade of electrons moving down the electron transport chain and leaving the light reactions

Photophosphorylation during photosynthesis differs from oxidative phosphorylation during cellular respiration in that

Photosystem II

________ cells in leaves are specialized for photosynthesis.

The full range of electromagnetic energy is called the ________ spectrum.

Where is chlorophyll found in a plant cell?

Which of the following are produced during the light reactions of photosynthesis?

Which of the following is the best summary of the process of photosynthesis?

The electrons lost from the reaction center of photosystem II are replaced by electrons from

The energy that excites the photosystems is supplied by

Put the following steps of the Calvin cycle in the correct order: 1. carbon fixation 2) regeneration of RuBP 3) release of G3P 4) reduction

The Calvin cycle constructs ________, an energy-rich molecule that a plant cell can then use to make glucose or other organic molecules.

An electron transport chain of the light reactions

Biology: Exploring Life

The Chemical Basis of Life

The Molecules of Cells

A Tour of the Cell

The Working Cell

How Cells Harvest Chemical Energy

The Cellular Basis of Reproduction and Inheritance

Patterns of Inheritance

Molecular Biology of the Gene

How Genes Are Controlled

DNA Technology and Genomics

How Populations Evolve

The Origin of Species

Tracing Evolutionary History

Microbial Life: Prokaryotes and Protists

The Evolution of Plant and Fungal Diversity

The Evolution of Invertebrate Diversity

The Evolution of Vertebrate Diversity

Unifying Concepts of Animal Structure and Function

Nutrition and Digestion

Gas Exchange

Circulation

The Immune System

Control of Body Temperature and Water Balance

Hormones and the Endocrine System

Reproduction and Embryonic Development

Nervous Systems

The Senses

How Animals Move

Plant Structure, Growth, and Reproduction

Plant Nutrition and Transport

Control Systems in Plants

The Biosphere: an Introduction to Earths Diverse Environments

Behavioral Adaptations to the Environment

Population Ecology

Communities and Ecosystems

Conservation Biology

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The graph shows records of temperature (light gray line) and CO₂ (dark gray line) over the past 1,000 years. CO₂ is recorded in parts per million (ppm). -If the trends shown in the graph continue, how might this affect photosynthesis?