Question 1

In warm and dry conditions,when CO2 levels fall and O2 levels rise,photorespiration occurs as a result of plants closing their ________.

Accepted Answer

Question 2

During the Calvin cycle,the enzyme rubisco forms an unstable carbohydrate by combining CO2 with a compound that contains ________ carbons.(Hint: The answer is a number. )

Accepted Answer

Question 3

Glycolysis is an anaerobic process,which means that glycolytic reactions

Accepted Answer

A)  require no oxygen. 
B)  produce molecular oxygen. 
C)  produce ATP. 
D)  produce citric acid. 
A)  require no oxygen. 
B)  produce molecular oxygen. 
C)  produce ATP. 
D)  produce citric acid.

Question 4

Each time we take a breath,we are bringing in the oxygen we need to stay alive.The ultimate source of the oxygen used by all aerobic organisms comes from a reaction that

Accepted Answer

A)  degrades carbon dioxide. 
B)  hydrolyzes ATP. 
C)  splits water. 
D)  reduces NADPH. 
A)  degrades carbon dioxide. 
B)  hydrolyzes ATP. 
C)  splits water. 
D)  reduces NADPH.

Question 5

The three stages of aerobic catabolism are

Accepted Answer

A)  photosynthesis,glycolysis,and oxidative phosphorylation. 
B)  glycolysis,the Krebs cycle,and oxidative phosphorylation. 
C)  glycolysis,fermentation,and the Krebs cycle. 
D)  photosynthesis,the Krebs cycle,and fermentation. 
A)  photosynthesis,glycolysis,and oxidative phosphorylation. 
B)  glycolysis,the Krebs cycle,and oxidative phosphorylation. 
C)  glycolysis,fermentation,and the Krebs cycle. 
D)  photosynthesis,the Krebs cycle,and fermentation.

Question 6

The energetics of photosynthesis often overshadows the importance of carbon fixation;without the vital process of carbon fixation,what would happen?

Accepted Answer

A)  Carbon dioxide levels would decrease uncontrollably,making the Earth too warm to support life. 
B)  Atmospheric oxygen levels would be too low to support life on Earth. 
C)  Carbon atoms would still be readily available in biologically useful forms,causing organisms to grow and reproduce at the normal rate. 
D)  Oxygen would bind carbon atoms spontaneously,producing more carbon dioxide. 
A)  Carbon dioxide levels would decrease uncontrollably,making the Earth too warm to support life. 
B)  Atmospheric oxygen levels would be too low to support life on Earth. 
C)  Carbon atoms would still be readily available in biologically useful forms,causing organisms to grow and reproduce at the normal rate. 
D)  Oxygen would bind carbon atoms spontaneously,producing more carbon dioxide.

Question 7

The outcome of the Calvin cycle is the

Accepted Answer

A)  capture of energy from sunlight. 
B)  synthesis of sugars like glucose,fructose,and sucrose. 
C)  production of pyruvate. 
D)  breakdown of complex molecules and the subsequent release of energy. 
A)  capture of energy from sunlight. 
B)  synthesis of sugars like glucose,fructose,and sucrose. 
C)  production of pyruvate. 
D)  breakdown of complex molecules and the subsequent release of energy.

Question 8

The type of reaction that breaks down food molecules and gradually oxidizes them to produce energy is a(n)________ reaction.

Accepted Answer

The answer of The type of reaction that breaks down...

Question 9

When CO2 levels are low and O2 levels are high,photosynthesis can be inefficient,because rubisco will add

Accepted Answer

A)  CO2 to ribulose 1,5-bisphosphate (RuBP)instead of O2. 
B)  O2 to RuBP instead of CO2. 
C)  CO2 to O2,forming sucrose instead of glucose. 
D)  CO2 to a molecule that contains four carbons. 
A)  CO2 to ribulose 1,5-bisphosphate (RuBP)instead of O2. 
B)  O2 to RuBP instead of CO2. 
C)  CO2 to O2,forming sucrose instead of glucose. 
D)  CO2 to a molecule that contains four carbons.

Question 10

The number and arrangement of membranes inside a chloroplast are important to the chloroplast's functions.How would the absence of these membranes affect the manufacture of ATP in a chloroplast?

Accepted Answer

A)  The chloroplast would be unable to maintain the proton gradient required for ATP production. 
B)  The chloroplast would be unable to capture ATP directly from the sun. 
C)  The chloroplast would be unable to perform the Calvin cycle. 
D)  The chloroplast would be unable to perform anaerobic respiration. 
A)  The chloroplast would be unable to maintain the proton gradient required for ATP production. 
B)  The chloroplast would be unable to capture ATP directly from the sun. 
C)  The chloroplast would be unable to perform the Calvin cycle. 
D)  The chloroplast would be unable to perform anaerobic respiration.

Question 11

Which of the following statements best summarizes the events of the Calvin cycle?

Accepted Answer

A)  The cycle uses ATP and NADPH to produce sugars. 
B)  The cycle moves electrons from photosystem II to photosystem I. 
C)  The cycle moves light-energized electrons to photosystem II. 
D)  The cycle absorbs light from the light reactions. 
A)  The cycle uses ATP and NADPH to produce sugars. 
B)  The cycle moves electrons from photosystem II to photosystem I. 
C)  The cycle moves light-energized electrons to photosystem II. 
D)  The cycle absorbs light from the light reactions.

Question 12

The mitochondria of plant cells contain thylakoids.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following statements describes the function of the electron transport chain (ETC)in photosynthesis?

Accepted Answer

A)  As electrons move through the ETC,they release energy that is used to concentrate protons in the thylakoid lumen. 
B)  As electrons move through the ETC,they catalyze the formation of ATP. 
C)  The ETC releases CO2 from glucose. 
D)  The ETC captures and stores the electrons that are given off by NADPH. 
A)  As electrons move through the ETC,they release energy that is used to concentrate protons in the thylakoid lumen. 
B)  As electrons move through the ETC,they catalyze the formation of ATP. 
C)  The ETC releases CO2 from glucose. 
D)  The ETC captures and stores the electrons that are given off by NADPH.

Question 14

Several plant pigments have significant antioxidant qualities and can protect a cell from the damage inflicted on its biomolecules by free radicals.

Accepted Answer

A) True 
 B)False

Question 15

Cellular respiration is essentially the opposite of photosynthesis.

Accepted Answer

A) True 
 B)False

Question 16

Cells use a variety of metabolic pathways to construct ATP,but each pathway concludes with the same step.Which of the following processes is the final step by which ADP becomes ATP?

Accepted Answer

A)  photosynthesis 
B)  phosphorylation 
C)  carbon fixation 
D)  electron transfer 
A)  photosynthesis 
B)  phosphorylation 
C)  carbon fixation 
D)  electron transfer

Question 17

The conversion of inorganic carbon from air into the carbon atoms found in all living organisms is known as carbon ________.

Accepted Answer

The answer of The conversion of inorganic carbon from air...

Question 18

Organisms that require oxygen to extract energy from food are ________.

Accepted Answer

The answer of Organisms that require oxygen to extract energy...

Question 19

During the process of photosynthesis,plants capture the kinetic energy of moving photons and transform it into potential energy in the form of

Accepted Answer

A)  pyruvate. 
B)  stroma. 
C)  chemical bonds. 
D)  thylakoid disks. 
A)  pyruvate. 
B)  stroma. 
C)  chemical bonds. 
D)  thylakoid disks.

Question 20

The series of chemical reactions that begins with rubisco adding oxygen to ribulose 1,5-bisphosphate (RuBP)and ends with the release of CO2 is called ________.

Accepted Answer

Exam 6: Photosynthesis and Cellular Respiration

In warm and dry conditions,when CO2 levels fall and O2 levels rise,photorespiration occurs as a result of plants closing their ________.

During the Calvin cycle,the enzyme rubisco forms an unstable carbohydrate by combining CO2 with a compound that contains ________ carbons.(Hint: The answer is a number. )

Glycolysis is an anaerobic process,which means that glycolytic reactions

Each time we take a breath,we are bringing in the oxygen we need to stay alive.The ultimate source of the oxygen used by all aerobic organisms comes from a reaction that

The three stages of aerobic catabolism are

The energetics of photosynthesis often overshadows the importance of carbon fixation;without the vital process of carbon fixation,what would happen?

The outcome of the Calvin cycle is the

The type of reaction that breaks down food molecules and gradually oxidizes them to produce energy is a(n)________ reaction.

When CO2 levels are low and O2 levels are high,photosynthesis can be inefficient,because rubisco will add

The number and arrangement of membranes inside a chloroplast are important to the chloroplast's functions.How would the absence of these membranes affect the manufacture of ATP in a chloroplast?

Which of the following statements best summarizes the events of the Calvin cycle?

The mitochondria of plant cells contain thylakoids.

Which of the following statements describes the function of the electron transport chain (ETC)in photosynthesis?

Several plant pigments have significant antioxidant qualities and can protect a cell from the damage inflicted on its biomolecules by free radicals.

Cellular respiration is essentially the opposite of photosynthesis.

Cells use a variety of metabolic pathways to construct ATP,but each pathway concludes with the same step.Which of the following processes is the final step by which ADP becomes ATP?

The conversion of inorganic carbon from air into the carbon atoms found in all living organisms is known as carbon ________.

Organisms that require oxygen to extract energy from food are ________.

During the process of photosynthesis,plants capture the kinetic energy of moving photons and transform it into potential energy in the form of

The series of chemical reactions that begins with rubisco adding oxygen to ribulose 1,5-bisphosphate (RuBP)and ends with the release of CO2 is called ________.

The Nature of Science and the Characteristics of Life

The Chemistry of Life

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy, Metabolism, and Enzymes

Cell Division

Cancer and Human Health

Patterns of Inheritance

Chromosomes and Human Genetics

DNA and Genes

From Gene to Protein

DNA Technology

How Evolution Works

The Origin of Species

The Evolution of Biodiversity

Biological Diversity, Bacteria, and Archaea

Protista, Plantae, and Fungi

Animalia

The Biosphere

Growth of Populations

Animal Behavior

Ecological Communities

Ecosystems

Global Change

Internal Organization and Homeostasis

Nutrition and Digestion

Circulation and Gas Exchange

Animal Hormones

Nervous and Sensory Systems

Skeletons,Muscles,and Movement

The Immune System

Reproduction and Development

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

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In warm and dry conditions,when CO₂ levels fall and O₂ levels rise,photorespiration occurs as a result of plants closing their ________.

During the Calvin cycle,the enzyme rubisco forms an unstable carbohydrate by combining CO₂ with a compound that contains ________ carbons.(Hint: The answer is a number. )

When CO₂ levels are low and O₂ levels are high,photosynthesis can be inefficient,because rubisco will add

The series of chemical reactions that begins with rubisco adding oxygen to ribulose 1,5-bisphosphate (RuBP)and ends with the release of CO₂ is called ________.