Question 1

A chemical reaction that uses ATP to build cellular components is

Accepted Answer

A)  catabolic. 
B)  anabolic. 
C)  photosynthetic. 
D)  respiration. 
A)  catabolic. 
B)  anabolic. 
C)  photosynthetic. 
D)  respiration.

Question 2

Which of the following molecules carries electrons to the electron transport chain of oxidative phosphorylation?

Accepted Answer

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

Question 3

Enzymes can catalyze a reaction only if they

Accepted Answer

A)  encounter a molecule of ATP. 
B)  have a phosphate bound to their active site. 
C)  have both products in their active site at the same time. 
D)  encounter a substrate that fits their active site. 
A)  encounter a molecule of ATP. 
B)  have a phosphate bound to their active site. 
C)  have both products in their active site at the same time. 
D)  encounter a substrate that fits their active site.

Question 4

Some kinds of drain cleaners use enzymes rather than strong,more dangerous chemicals.These enzymes must be able to

Accepted Answer

A)  catalyze a catabolic reaction. 
B)  raise the energy of the reaction that clears the clog. 
C)  create energy that can be used to break up the clog. 
D)  catalyze an anabolic reaction. 
A)  catalyze a catabolic reaction. 
B)  raise the energy of the reaction that clears the clog. 
C)  create energy that can be used to break up the clog. 
D)  catalyze an anabolic reaction.

Question 5

A mutation in a plant cell produces rubisco enzymes,which can only bind O2 (and not CO2).What would be the outcome of this mutation?

Accepted Answer

This plant would not be able t

Question 6

Which of the following is either consumed or synthesized in virtually every cellular reaction?

Accepted Answer

A)  sugars 
B)  enzymes 
C)  DNA 
D)  ATP 
A)  sugars 
B)  enzymes 
C)  DNA 
D)  ATP

Question 7

A cell is found that uses sunlight to produce ATP,but it does not produce NADPH.The portion of the light reaction that is not functioning is ________.

Accepted Answer

The answer of A cell is found that uses sunlight...

Question 8

A worker is paid every two weeks.She uses some of this money to pay for essentials and puts the remainder of her money in a savings account at a bank.The money the worker saves is analogous to the

Accepted Answer

A)  conversion of ADP and phosphate into ATP. 
B)  conversion of ATP into ADP and phosphate. 
C)  way electrons are used to pump protons across a membrane. 
D)  way enzymes catalyze chemical reactions in a cell. 
A)  conversion of ADP and phosphate into ATP. 
B)  conversion of ATP into ADP and phosphate. 
C)  way electrons are used to pump protons across a membrane. 
D)  way enzymes catalyze chemical reactions in a cell.

Question 9

Excess carbon dioxide in the atmosphere is increasing climate change.How do photosynthesis and cellular respiration relate to this issue,and how can we use this knowledge to help decrease this problem?

Accepted Answer

Photosynthesis takes in carbon

Question 10

What would be the initial outcome of decreasing the number of photosynthetic organisms on Earth with no change in the number of organisms using cellular respiration?

Accepted Answer

A)  Oxygen levels would increase. 
B)  Carbon dioxide levels would increase. 
C)  More glucose would be available to animals. 
D)  Animals would access energy directly from sunlight. 
A)  Oxygen levels would increase. 
B)  Carbon dioxide levels would increase. 
C)  More glucose would be available to animals. 
D)  Animals would access energy directly from sunlight.

Question 11

Two students are discussing the importance of glycolysis in human cells.One student states that the main function of glycolysis is to produce ATP.The other states that the main function is to produce NADH.Which student is correct?

Accepted Answer

The second student is correct.Although g

Question 12

The Krebs cycle produces

Accepted Answer

A)  NADH,ATP,and FADH2. 
B)  water and carbon dioxide. 
C)  ADP and NADP+. 
D)  acetyl CoA and sugars. 
A)  NADH,ATP,and FADH2. 
B)  water and carbon dioxide. 
C)  ADP and NADP+. 
D)  acetyl CoA and sugars.

Question 13

Each time a person takes a breath,he or she is bringing in the oxygen he or she needs to stay alive.The ultimate source of the oxygen used by all aerobic organisms comes from a reaction that breaks down

Accepted Answer

A)  carbon dioxide. 
B)  ATP. 
C)  water. 
D)  NADPH. 
A)  carbon dioxide. 
B)  ATP. 
C)  water. 
D)  NADPH.

Question 14

If the mitochondria of a cell did not produce an inner membrane,the mitochondria would be unable to

Accepted Answer

A)  maintain the proton gradient required for ATP production. 
B)  capture ATP from the sun. 
C)  perform the Krebs cycle. 
D)  perform glycolysis. 
A)  maintain the proton gradient required for ATP production. 
B)  capture ATP from the sun. 
C)  perform the Krebs cycle. 
D)  perform glycolysis.

Question 15

The image below diagrams the action of an enzyme.Notice that the enzyme is depicted as being more tightly wrapped around the substrates in step 2 than it is in step 1.Why is this?

Accepted Answer

A)  When a substrate locks into the active site of an enzyme,the enzyme changes shape to mold itself around the substrates. 
B)  Generally,the size of a substrate is larger than the size of the active site into which it must fit.When the substrate enters the active site,the active site must stretch to fit. 
C)  Before catalysis can occur,a substrate must change its shape so that it fits into the active site of the enzyme more precisely. 
D)  Most active sites are only designed to hold one substrate.In this image,two substrates enter the active site,creating a tighter fit. 
A)  When a substrate locks into the active site of an enzyme,the enzyme changes shape to mold itself around the substrates. 
B)  Generally,the size of a substrate is larger than the size of the active site into which it must fit.When the substrate enters the active site,the active site must stretch to fit. 
C)  Before catalysis can occur,a substrate must change its shape so that it fits into the active site of the enzyme more precisely. 
D)  Most active sites are only designed to hold one substrate.In this image,two substrates enter the active site,creating a tighter fit.

Question 16

In a human cell,

Accepted Answer

A)  one enzyme usually catalyzes more than five different chemical reactions. 
B)  nearly all chemical reactions are catalyzed by enzymes. 
C)  enzymes must be constantly replaced as they are used up in the reactions that they catalyze. 
D)  some enzymes are specialized to store energy in the form of electrons. 
A)  one enzyme usually catalyzes more than five different chemical reactions. 
B)  nearly all chemical reactions are catalyzed by enzymes. 
C)  enzymes must be constantly replaced as they are used up in the reactions that they catalyze. 
D)  some enzymes are specialized to store energy in the form of electrons.

Question 17

A protein in the cell membrane is used to transport molecules against their concentration gradient by active transport.________ is required for this type of transport.

Accepted Answer

The answer of A protein in the cell membrane is...

Question 18

Examine the illustration below.Which statement best summarizes the contribution of photosystem I (PS I)during photosynthesis?

Accepted Answer

A)  PS I provides the initial energy boost to the electrons on their way to photosystem II (PS II). 
B)  PS I energizes electrons that initially accumulate within the thylakoid space and eventually drive ATP synthesis. 
C)  PS I energizes electrons that are transported by NADPH to the Calvin cycle and will eventually reduce the carbon in CO2. 
D)  PS I regulates the transmembrane passage of protons through the thylakoid membrane. 
A)  PS I provides the initial energy boost to the electrons on their way to photosystem II (PS II). 
B)  PS I energizes electrons that initially accumulate within the thylakoid space and eventually drive ATP synthesis. 
C)  PS I energizes electrons that are transported by NADPH to the Calvin cycle and will eventually reduce the carbon in CO2. 
D)  PS I regulates the transmembrane passage of protons through the thylakoid membrane.

Question 19

The energy required for life processes must be extracted from an organism's

Accepted Answer

A)  nucleus. 
B)  environment. 
C)  predators. 
D)  biosynthesis. 
A)  nucleus. 
B)  environment. 
C)  predators. 
D)  biosynthesis.

Question 20

During exercise,the increase in respiration rate and heart rate are driven by the need to replenish the oxygen used to support

Accepted Answer

A)  lactic acid fermentation. 
B)  carbon dioxide synthesis in the lungs. 
C)  oxidative phosphorylation in muscle cell mitochondria. 
D)  the Calvin cycle of photosynthesis. 
A)  lactic acid fermentation. 
B)  carbon dioxide synthesis in the lungs. 
C)  oxidative phosphorylation in muscle cell mitochondria. 
D)  the Calvin cycle of photosynthesis.

A chemical reaction that uses ATP to build cellular components is

Which of the following molecules carries electrons to the electron transport chain of oxidative phosphorylation?

Enzymes can catalyze a reaction only if they

Some kinds of drain cleaners use enzymes rather than strong,more dangerous chemicals.These enzymes must be able to

A mutation in a plant cell produces rubisco enzymes,which can only bind O₂ (and not CO₂).What would be the outcome of this mutation?

Which of the following is either consumed or synthesized in virtually every cellular reaction?

A cell is found that uses sunlight to produce ATP,but it does not produce NADPH.The portion of the light reaction that is not functioning is ________.

A worker is paid every two weeks.She uses some of this money to pay for essentials and puts the remainder of her money in a savings account at a bank.The money the worker saves is analogous to the

Excess carbon dioxide in the atmosphere is increasing climate change.How do photosynthesis and cellular respiration relate to this issue,and how can we use this knowledge to help decrease this problem?

What would be the initial outcome of decreasing the number of photosynthetic organisms on Earth with no change in the number of organisms using cellular respiration?

Two students are discussing the importance of glycolysis in human cells.One student states that the main function of glycolysis is to produce ATP.The other states that the main function is to produce NADH.Which student is correct?

The Krebs cycle produces

Each time a person takes a breath,he or she is bringing in the oxygen he or she needs to stay alive.The ultimate source of the oxygen used by all aerobic organisms comes from a reaction that breaks down

If the mitochondria of a cell did not produce an inner membrane,the mitochondria would be unable to

The image below diagrams the action of an enzyme.Notice that the enzyme is depicted as being more tightly wrapped around the substrates in step 2 than it is in step 1.Why is this?

In a human cell,

A protein in the cell membrane is used to transport molecules against their concentration gradient by active transport.________ is required for this type of transport.

Examine the illustration below.Which statement best summarizes the contribution of photosystem I (PS I)during photosynthesis?

The energy required for life processes must be extracted from an organism's

During exercise,the increase in respiration rate and heart rate are driven by the need to replenish the oxygen used to support

The Nature of Science

Evaluating Scientific Claims

Chemistry of Life

Life Is Cellular

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

The History of Life

Bacteria and Archaea

Plants,fungi,and Protists

Animals and Human Evolution

Filters

Exam 5: How Cells Work

A chemical reaction that uses ATP to build cellular components is

Which of the following molecules carries electrons to the electron transport chain of oxidative phosphorylation?

Enzymes can catalyze a reaction only if they

Some kinds of drain cleaners use enzymes rather than strong,more dangerous chemicals.These enzymes must be able to

A mutation in a plant cell produces rubisco enzymes,which can only bind O2 (and not CO2).What would be the outcome of this mutation?

Which of the following is either consumed or synthesized in virtually every cellular reaction?

A cell is found that uses sunlight to produce ATP,but it does not produce NADPH.The portion of the light reaction that is not functioning is ________.

A worker is paid every two weeks.She uses some of this money to pay for essentials and puts the remainder of her money in a savings account at a bank.The money the worker saves is analogous to the

Excess carbon dioxide in the atmosphere is increasing climate change.How do photosynthesis and cellular respiration relate to this issue,and how can we use this knowledge to help decrease this problem?

What would be the initial outcome of decreasing the number of photosynthetic organisms on Earth with no change in the number of organisms using cellular respiration?

Two students are discussing the importance of glycolysis in human cells.One student states that the main function of glycolysis is to produce ATP.The other states that the main function is to produce NADH.Which student is correct?

The Krebs cycle produces

Each time a person takes a breath,he or she is bringing in the oxygen he or she needs to stay alive.The ultimate source of the oxygen used by all aerobic organisms comes from a reaction that breaks down

If the mitochondria of a cell did not produce an inner membrane,the mitochondria would be unable to

The image below diagrams the action of an enzyme.Notice that the enzyme is depicted as being more tightly wrapped around the substrates in step 2 than it is in step 1.Why is this?

In a human cell,

A protein in the cell membrane is used to transport molecules against their concentration gradient by active transport.________ is required for this type of transport.

Examine the illustration below.Which statement best summarizes the contribution of photosystem I (PS I)during photosynthesis?

The energy required for life processes must be extracted from an organism's

During exercise,the increase in respiration rate and heart rate are driven by the need to replenish the oxygen used to support

The Nature of Science

Evaluating Scientific Claims

Chemistry of Life

Life Is Cellular

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

The History of Life

Bacteria and Archaea

Plants,fungi,and Protists

Animals and Human Evolution

Filters

A mutation in a plant cell produces rubisco enzymes,which can only bind O₂ (and not CO₂).What would be the outcome of this mutation?