Question 1

Where is chlorophyll found in a plant cell?

Accepted Answer

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

Question 2

Photosystem II

Accepted Answer

A) passes electrons to photosystem I. 
B) releases CO2 as a by- product. 
C) does not have a reaction center. 
D) has P700 at its reaction center. 
A) passes electrons to photosystem I. 
B) releases CO2 as a by- product. 
C) does not have a reaction center. 
D) has P700 at its reaction center.

Question 3

Which of the following is part of the light reaction?

Accepted Answer

A) regeneration of NADP+ 
B) reduction of carbon 
C) formation of waste products in the form of O2 
D) carbon fixation 
A) regeneration of NADP+ 
B) reduction of carbon 
C) formation of waste products in the form of O2 
D) carbon fixation

Question 4

A packet of light energy is called a

Accepted Answer

A) photon. 
B) quantum. 
C) phaser. 
D) pigment. 
A) photon. 
B) quantum. 
C) phaser. 
D) pigment.

Question 5

Photorespiration

Accepted Answer

A) may be an evolutionary relic from when atmospheric O2 levels were low. 
B) produces glucose. 
C) is attributable to high CO2 levels. 
D) is of benefit to the plant since it breaks down rubisco. 
A) may be an evolutionary relic from when atmospheric O2 levels were low. 
B) produces glucose. 
C) is attributable to high CO2 levels. 
D) is of benefit to the plant since it breaks down rubisco.

Question 6

How do the reaction centers of photosystem I and II differ?

Accepted Answer

A) Photosystem II does not transfer electrons from photons. 
B) Each preferentially absorbs slightly different wavelengths of light. 
C) Photosystem I functions first in the sequence of steps that make up the light reactions. 
D) Chlorophyll a is found in photosystem I and chlorophyll b in photosystem II. 
A) Photosystem II does not transfer electrons from photons. 
B) Each preferentially absorbs slightly different wavelengths of light. 
C) Photosystem I functions first in the sequence of steps that make up the light reactions. 
D) Chlorophyll a is found in photosystem I and chlorophyll b in photosystem II.

Question 7

Plant cells are protected from the harmful effects of reactive oxidative molecules by

Accepted Answer

A) mitochondria. 
B) carotenoids. 
C) chlorophyll. 
D) ATP. 
A) mitochondria. 
B) carotenoids. 
C) chlorophyll. 
D) ATP.

Question 8

Carbon fixation

Accepted Answer

A) provides the cell with a supply of NADPH molecules. 
B) occurs when carbon atoms from CO2 are incorporated into an organic molecule. 
C) supplies the cell with ATP. 
D) occurs during the light reactions. 
A) provides the cell with a supply of NADPH molecules. 
B) occurs when carbon atoms from CO2 are incorporated into an organic molecule. 
C) supplies the cell with ATP. 
D) occurs during the light reactions.

Question 9

Mitochondria transfer _ energy from _ to ATP; chloroplasts transform energy into the chemical energy of ATP.

Accepted Answer

A) food ...light ...nuclear 
B) chemical ...food ...light 
C) light ...food ...kinetic 
D) food ...light ...chemical 
A) food ...light ...nuclear 
B) chemical ...food ...light 
C) light ...food ...kinetic 
D) food ...light ...chemical

Question 10

The ultimate source of all the food we eat and the oxygen we breathe is

Accepted Answer

A) glycolysis. 
B) photosynthesis. 
C) cellular respiration. 
D) anaerobic metabolism. 
A) glycolysis. 
B) photosynthesis. 
C) cellular respiration. 
D) anaerobic metabolism.

Question 11

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

Accepted Answer

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

Question 12

The light reactions occur in the ,while the Calvin cycle occurs in the .

Accepted Answer

A) cytoplasm ...thylakoid membrane 
B) thylakoid membranes ...stroma 
C) stroma ...thylakoid membranes 
D) stroma ...nucleus 
A) cytoplasm ...thylakoid membrane 
B) thylakoid membranes ...stroma 
C) stroma ...thylakoid membranes 
D) stroma ...nucleus

Question 13

The chloroplast ATP synthase

Accepted Answer

A) couples the flow of H+ to the phosphorylation of ADP. 
B) is a nucleic acid complex. 
C) is found in the stroma. 
D) helps transport H+ against the concentration gradient. 
A) couples the flow of H+ to the phosphorylation of ADP. 
B) is a nucleic acid complex. 
C) is found in the stroma. 
D) helps transport H+ against the concentration gradient.

Question 14

The electron transport chains of the light reactions

Accepted Answer

A) shuttle electrons along in a series of redox reactions. 
B) are found on the plasma membrane of mesophyll cells. 
C) provide energy for the citric acid cycle. 
D) are located in the stroma. 
A) shuttle electrons along in a series of redox reactions. 
B) are found on the plasma membrane of mesophyll cells. 
C) provide energy for the citric acid cycle. 
D) are located in the stroma.

Question 15

Global warming due to the greenhouse effect may be

Accepted Answer

A) reduced by the burning of fossil fuels,which removes oxygen from the atmosphere. 
B) of little concern,since it is part of the normal cycle for the planet. 
C) made worse by photosynthesis,which adds carbon dioxide to the atmosphere. 
D) moderated by photosynthesis,which removes carbon dioxide from the atmosphere. 
A) reduced by the burning of fossil fuels,which removes oxygen from the atmosphere. 
B) of little concern,since it is part of the normal cycle for the planet. 
C) made worse by photosynthesis,which adds carbon dioxide to the atmosphere. 
D) moderated by photosynthesis,which removes carbon dioxide from the atmosphere.

Question 16

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

Accepted Answer

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

Question 17

What is the main adaptive advantage of the C4 and CAM photosynthesis strategies over the C3 strategy?

Accepted Answer

A) They make it possible for the plant to use the Calvin cycle at night. 
B) They allow the plant to fix carbon more efficiently in dim or cool conditions. 
C) They help the plant conserve water and synthesize glucose efficiently under hot,dry conditions. 
D) They allow the plant to fix carbon more efficiently under conditions of low atmospheric CO2. 
A) They make it possible for the plant to use the Calvin cycle at night. 
B) They allow the plant to fix carbon more efficiently in dim or cool conditions. 
C) They help the plant conserve water and synthesize glucose efficiently under hot,dry conditions. 
D) They allow the plant to fix carbon more efficiently under conditions of low atmospheric CO2.

Question 18

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

Accepted Answer

A) the top of the electron transport chain. 
B) the bottom of the electron transport chain. 
C) CO2. 
D) H2O. 
A) the top of the electron transport chain. 
B) the bottom of the electron transport chain. 
C) CO2. 
D) H2O.

Question 19

The full range of electromagnetic energy is called the spectrum.

Accepted Answer

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

Question 20

The oxygen released into the air as a product of photosynthesis comes from

Accepted Answer

A) water. 
B) chlorophyll. 
C) glucose. 
D) carbon dioxide. 
A) water. 
B) chlorophyll. 
C) glucose. 
D) carbon dioxide.

Exam 7: Photosynthesis: Using Light to Make Food

Where is chlorophyll found in a plant cell?

Photosystem II

Which of the following is part of the light reaction?

A packet of light energy is called a

Photorespiration

How do the reaction centers of photosystem I and II differ?

Plant cells are protected from the harmful effects of reactive oxidative molecules by

Carbon fixation

Mitochondria transfer _ energy from _ to ATP; chloroplasts transform energy into the chemical energy of ATP.

The ultimate source of all the food we eat and the oxygen we breathe is

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

The light reactions occur in the ,while the Calvin cycle occurs in the .

The chloroplast ATP synthase

The electron transport chains of the light reactions

Global warming due to the greenhouse effect may be

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

What is the main adaptive advantage of the C4 and CAM photosynthesis strategies over the C3 strategy?

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

The full range of electromagnetic energy is called the spectrum.

The oxygen released into the air as a product of photosynthesis comes from

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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