Question 1

Which of the following molecules carries electrons that will be used to reduce other molecules in an electron transport chain?

Accepted Answer

A)  ATP 
B)  NADH 
C)  CO2 
D)  ADP 
A)  ATP 
B)  NADH 
C)  CO2 
D)  ADP

Question 2

Which of the following characteristics applies to chloroplasts?

Accepted Answer

A)  They have an intermembrane space and a matrix. 
B)  They have three membrane-enclosed compartments. 
C)  Unlike mitochondria,they lack a stroma. 
D)  They carry out both photosynthesis and respiration. 
A)  They have an intermembrane space and a matrix. 
B)  They have three membrane-enclosed compartments. 
C)  Unlike mitochondria,they lack a stroma. 
D)  They carry out both photosynthesis and respiration.

Question 3

What is the importance of photosynthesis to organisms other than plants?

Accepted Answer

A)  All other organisms require oxygen for life processes. 
B)  The sugars made during photosynthesis are building blocks of DNA. 
C)  All cells must have chloroplasts to survive. 
D)  Photosynthesis captures energy that other organisms access when they eat either plants or organisms that eat plants. 
A)  All other organisms require oxygen for life processes. 
B)  The sugars made during photosynthesis are building blocks of DNA. 
C)  All cells must have chloroplasts to survive. 
D)  Photosynthesis captures energy that other organisms access when they eat either plants or organisms that eat plants.

Question 4

Most people respond to a prolonged stay at high altitude by producing more hemoglobin,producing more and larger red blood cells,or both.

Accepted Answer

A) True 
 B)False

Question 5

The Krebs cycle produces

Accepted Answer

A)  NADH and carbon dioxide. 
B)  water and carbon dioxide. 
C)  ADP and NADP+. 
D)  acetyl CoA and sugars. 
A)  NADH and carbon dioxide. 
B)  water and carbon dioxide. 
C)  ADP and NADP+. 
D)  acetyl CoA and sugars.

Question 6

The process that converts NADH into NAD+ to keep glycolysis running under anaerobic conditions is called ________.

Accepted Answer

Question 7

The muscle cells of a very active organism would contain fewer mitochondria than those of a less active organism.

Accepted Answer

A) True 
 B)False

Question 8

The energy source that makes oxidative phosphorylation possible comes from

Accepted Answer

A)  phosphate group transfers from ATP. 
B)  electrons that are transferred from NADPH. 
C)  electrons that are transferred from NADH. 
D)  electrons that are removed from CO2 during its oxidation. 
A)  phosphate group transfers from ATP. 
B)  electrons that are transferred from NADPH. 
C)  electrons that are transferred from NADH. 
D)  electrons that are removed from CO2 during its oxidation.

Question 9

Today,the pathways of photosynthesis and cellular respiration are complementary and relatively balanced,but early in the history of life on Earth,photosynthesis appears to have dominated.One piece of evidence that suggests the early dominance of photosynthesis is the

Accepted Answer

A)  accumulation of atmospheric oxygen. 
B)  declines in historic sea levels as photosynthetic organisms consumed water. 
C)  gradual warming of Earth's climate as CO2 slowly accumulated. 
D)  sequestration of O2 in Earth's oceans. 
A)  accumulation of atmospheric oxygen. 
B)  declines in historic sea levels as photosynthetic organisms consumed water. 
C)  gradual warming of Earth's climate as CO2 slowly accumulated. 
D)  sequestration of O2 in Earth's oceans.

Question 10

The photosynthetic reactions that are dependent on light occur in the

Accepted Answer

A)  thylakoid membrane. 
B)  stroma. 
C)  cytosol. 
D)  nucleus. 
A)  thylakoid membrane. 
B)  stroma. 
C)  cytosol. 
D)  nucleus.

Question 11

In mitochondria,ATP is produced in conjunction with proteins in the membrane that surrounds a region in the mitochondrion known as the ________.

Accepted Answer

The answer of In mitochondria,ATP is produced in conjunction with...

Question 12

You have shrunk to molecular size and find yourself in a mitochondrial chamber where protons are being pumped out of the chamber and across a membrane into another chamber.You are in the mitochondrion's ________.

Accepted Answer

The answer of You have shrunk to molecular size and...

Question 13

The enzyme rubisco is important to the process of

Accepted Answer

A)  catabolism. 
B)  fermentation. 
C)  glycolysis. 
D)  carbon fixation. 
A)  catabolism. 
B)  fermentation. 
C)  glycolysis. 
D)  carbon fixation.

Question 14

The NADH produced by the Krebs cycle donates electrons to the electron transport chain.

Accepted Answer

A) True 
 B)False

Question 15

The innermost membrane in a chloroplast is the ________ membrane.

Accepted Answer

The answer of The innermost membrane in a chloroplast is...

Question 16

World-class sprinters typically do not breathe during the 9+ seconds it takes to complete a 100-meter race.What does this fact suggest about these runners' energy production?

Accepted Answer

A)  It must be mitochondrial,with oxygen provided by one big breath at the beginning of the sprint. 
B)  It must be mitochondrial,with oxygen provided by circulating hemoglobin that is already saturated with oxygen. 
C)  It must be glycolytic;the process is entirely anaerobic and the race will be over before NADH+ reserves are depleted. 
D)  It must be fermentative,which explains why most sprinters experience cramping after the race ends. 
A)  It must be mitochondrial,with oxygen provided by one big breath at the beginning of the sprint. 
B)  It must be mitochondrial,with oxygen provided by circulating hemoglobin that is already saturated with oxygen. 
C)  It must be glycolytic;the process is entirely anaerobic and the race will be over before NADH+ reserves are depleted. 
D)  It must be fermentative,which explains why most sprinters experience cramping after the race ends.

Question 17

Which of the following statements about NADP+ is true?

Accepted Answer

A)  It is oxidized by photosystem I. 
B)  It is reduced by photosystem I. 
C)  It is reduced by photosystem II. 
D)  It is oxidized by photosystem II. 
A)  It is oxidized by photosystem I. 
B)  It is reduced by photosystem I. 
C)  It is reduced by photosystem II. 
D)  It is oxidized by photosystem II.

Question 18

Most of the oxidation reactions that produce NADH in a cell take place in

Accepted Answer

A)  the Krebs cycle. 
B)  glycolysis. 
C)  photosynthesis. 
D)  the electron transport chain. 
A)  the Krebs cycle. 
B)  glycolysis. 
C)  photosynthesis. 
D)  the electron transport chain.

Question 19

Which of the following statements comparing photosynthesis with cellular respiration is true?

Accepted Answer

A)  Photosynthesis is a catabolic pathway,whereas cellular respiration is an anabolic pathway. 
B)  Water is formed during photosynthesis but broken apart during cellular respiration. 
C)  Both photosynthesis and cellular respiration require electron transport chains. 
D)  Both photosynthesis and cellular respiration produce CO2 as metabolic end products. 
A)  Photosynthesis is a catabolic pathway,whereas cellular respiration is an anabolic pathway. 
B)  Water is formed during photosynthesis but broken apart during cellular respiration. 
C)  Both photosynthesis and cellular respiration require electron transport chains. 
D)  Both photosynthesis and cellular respiration produce CO2 as metabolic end products.

Question 20

If plants are able to capture energy from the sun,why do they need to pass that energy through the chemical reactions that are necessary to produce ATP?

Accepted Answer

A)  ATP enables the energy to be stored for later use or transferred to other chemical reactions. 
B)  Chloroplasts are unable to use the energy they capture from the sun. 
C)  Producing ATP enables the plant to destroy excess energy that was captured from the sun. 
D)  The mitochondria that capture the sun's energy are unable to use it for respiration. 
A)  ATP enables the energy to be stored for later use or transferred to other chemical reactions. 
B)  Chloroplasts are unable to use the energy they capture from the sun. 
C)  Producing ATP enables the plant to destroy excess energy that was captured from the sun. 
D)  The mitochondria that capture the sun's energy are unable to use it for respiration.

Exam 6: Photosynthesis and Cellular Respiration

Which of the following molecules carries electrons that will be used to reduce other molecules in an electron transport chain?

Which of the following characteristics applies to chloroplasts?

What is the importance of photosynthesis to organisms other than plants?

Most people respond to a prolonged stay at high altitude by producing more hemoglobin,producing more and larger red blood cells,or both.

The Krebs cycle produces

The process that converts NADH into NAD+ to keep glycolysis running under anaerobic conditions is called ________.

The muscle cells of a very active organism would contain fewer mitochondria than those of a less active organism.

The energy source that makes oxidative phosphorylation possible comes from

Today,the pathways of photosynthesis and cellular respiration are complementary and relatively balanced,but early in the history of life on Earth,photosynthesis appears to have dominated.One piece of evidence that suggests the early dominance of photosynthesis is the

The photosynthetic reactions that are dependent on light occur in the

In mitochondria,ATP is produced in conjunction with proteins in the membrane that surrounds a region in the mitochondrion known as the ________.

You have shrunk to molecular size and find yourself in a mitochondrial chamber where protons are being pumped out of the chamber and across a membrane into another chamber.You are in the mitochondrion's ________.

The enzyme rubisco is important to the process of

The NADH produced by the Krebs cycle donates electrons to the electron transport chain.

The innermost membrane in a chloroplast is the ________ membrane.

World-class sprinters typically do not breathe during the 9+ seconds it takes to complete a 100-meter race.What does this fact suggest about these runners' energy production?

Which of the following statements about NADP+ is true?

Most of the oxidation reactions that produce NADH in a cell take place in

Which of the following statements comparing photosynthesis with cellular respiration is true?

If plants are able to capture energy from the sun,why do they need to pass that energy through the chemical reactions that are necessary to produce ATP?

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

Filters

The process that converts NADH into NAD⁺ to keep glycolysis running under anaerobic conditions is called ________.

Which of the following statements about NADP⁺ is true?