Question 1

The most common way for energy-absorbing reactions to be powered in cells is for them to be coupled with the breakdown of ATP.

Accepted Answer

A) True 
 B)False

Question 2

If a drug is designed to denature enzymes involved in digesting phenylalanine,why would patients treated with this drug develop phenylketonuria?

Accepted Answer

A)   They lack an enzyme to break down phenylalanine.
B)   They lack an enzyme to produce phenylalanine.
C)   They produce too much phenylalanine.
D)   They lack an inhibitor of an enzyme to break down phenylalanine.
E)   They eat more phenylalanine than most people.F) A) and B)
G) A) and C)

Question 3

In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," why does water leave the cell by osmosis after the active transport of chloride ions out of the cell by CFTR?

Accepted Answer

A)   The cell is now in a hypertonic solution.
B)   The cell is now in a hypotonic solution.
C)   The cell is now in an isotonic solution.
D)   The cell needs to regenerate the ATP used in active transport.
E)   The cell must pump out water to avoid bursting.F) B) and D)
G) None of the above

Question 4

Whenever ATP is produced by a chemical reaction some energy is lost into the surroundings as heat.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following are examples of kinetic energy?

Accepted Answer

A)   electrons moving through the electron transport chain, protons moving through ATP synthase
B)   electrons in chemical bonds, proton gradient, ATP
C)   electrons moving through the electron transport chain, proton gradient
D)   protons moving through ATP synthase, ATP
E)   All answer choices are correct.F) B) and D)
G) None of the above

Question 6

Oxidation-reduction reactions

Accepted Answer

A)   transfer electrons from one molecule to another.
B)   are not used by living cells.
C)   transfer protons from one molecule to another.
D)   reduce the amount of oxygen in the cell.
E)   increase the amount of oxygen in the cell.F) C) and E)
G) A) and E)

Question 7

-The vertical drop slightly after the peak of each curve on the figure illustrates

Accepted Answer

A)   that enzymes will not work if temperatures are too hot (or too cold) .
B)   an increased rate of reaction.
C)   a decreased temperature.
D)   that temperatures only affect enzymes up to a specific temperature.
E)   that enzymes are most efficient at cold temperatures.F) C) and E)
G) A) and D)

Question 8

Examples of potential energy include

Accepted Answer

A)   chemical bonds and concentration gradients.
B)   light and chemical bonds.
C)   quartz crystals vibrating in a wristwatch.
D)   soil heated by sunlight.
E)   light and the motion of a muscle.F) B) and C)
G) C) and E)

Question 9

The chemical formula for glucose is

Accepted Answer

A)   C₆H₆O₆.
B)   C₁₂H₆O₁₂.
C)   C₁₂H₂₂O₁₁.
D)   C₆H₆O₁₂.
E)   C₆H₁₂O₆.F) None of the above
G) A) and D)

Question 10

The area on the enzyme where the substrate binds is called

Accepted Answer

A)   an active site.
B)   a binding pocket.
C)   a reaction site.
D)   a catalyst site.
E)   an analog.F) B) and E)
G) A) and D)

Question 11

Reactions that take up energy proceed spontaneously.

Accepted Answer

A) True 
 B)False

Question 12

Reduction is the gain of electrons.

Accepted Answer

A) True 
 B)False

Question 13

If you were looking for a card describing the breakdown of glucose to carbon dioxide and water,you would look in a drawer labelled with what information?

Accepted Answer

A)   takes up energy, photosynthesis
B)   takes up energy, cellular respiration
C)   releases energy, photosynthesis
D)   releases energy, cellular respiration
E)   No answer is correctF) C) and E)
G) D) and E)

Question 14

In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," those with the genetic mutation in the protein are resistant to cholera infections.What did the scientists hypothesize about the relationship between cystic fibrosis and cholera resistance?

Accepted Answer

A)   Carriers with one copy of the defective CFTR gene have decreased resistance to cholera compared to those with no defective copies.
B)   These individuals were exposed to cholera, causing mutations in their CFTR gene that can then be passed on to their children.
C)   Carriers will be more likely to have children who develop cystic fibrosis.
D)   Carriers with one copy of the defective CFTR gene have increased resistance to cholera compared to those with no defective copies.
E)   Only carriers would be able to survive exposure to cholera.F) A) and E)
G) None of the above

Question 15

If you had to grade an exam question about oxidation-reduction reactions,you would give the most points if a student said that they

Accepted Answer

A)   never occur at the same time.
B)   remove electrons from both molecules involved.
C)   remove protons from one molecule and join them to another molecule.
D)   occur simultaneously.
E)   remove oxygen from the cell.F) A) and C)
G) None of the above

Question 16

Oxidation is the loss of electrons.

Accepted Answer

A) True 
 B)False

Question 17

-The two data curves on the figure illustrate that

Accepted Answer

A)   temperature ranges are not the same for all enzyme activity.
B)   temperature is not related to enzyme efficiency.
C)   optimal temperature ranges are the same for all enzymes.
D)   pH is not related to enzyme efficiency.
E)   All answers are correct.F) C) and D)
G) A) and D)

Question 18

A bowl of sugar water is very stable.If you feed it to cells it is rapidly broken down into carbon dioxide,water,and ATP.What is the best explanation for this reaction?

Accepted Answer

A)   Enzymes in the cells catalyze the breakdown of the glucose.
B)   Cells use energy to break down the glucose.
C)   Glucose becomes more chemically reactive inside of  cells.
D)   Glucose cannot be broken down outside of cells.
E)   Glucose is removed from the cells by active transport.F) A) and E)
G) A) and D)

Question 19

Phagocytosis is an example of

Accepted Answer

A)   exocytosis.
B)   passive transport.
C)   simple diffusion.
D)   endocytosis.
E)   facilitated diffusion.F) B) and C)
G) B) and D)

Question 20

Studies of fireflies show that as they produce light,they constantly recycle ATP.Why might this be?

Accepted Answer

A)   ATP breakdown releases light.
B)   ATP is light-sensitive.
C)   ATP powers light production in fireflies.
D)   Fireflies need ATP for other processes.
E)   No answer is correct.F) B) and D)
G) C) and E)

Exam 4: The Energy of Life

The most common way for energy-absorbing reactions to be powered in cells is for them to be coupled with the breakdown of ATP.

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-The two data curves on the figure illustrate that

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Oxidation is the loss of electrons.

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If you were looking for a card describing the breakdown of glucose to carbon dioxide and water,you would look in a drawer labelled with what information?

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A bowl of sugar water is very stable.If you feed it to cells it is rapidly broken down into carbon dioxide,water,and ATP.What is the best explanation for this reaction?

Correct AnswerverifiedShow Answer

-The vertical drop slightly after the peak of each curve on the figure illustrates

Correct AnswerverifiedShow Answer

Reduction is the gain of electrons.

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Reactions that take up energy proceed spontaneously.

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Whenever ATP is produced by a chemical reaction some energy is lost into the surroundings as heat.

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In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," why does water leave the cell by osmosis after the active transport of chloride ions out of the cell by CFTR?

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The area on the enzyme where the substrate binds is called

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," those with the genetic mutation in the protein are resistant to cholera infections.What did the scientists hypothesize about the relationship between cystic fibrosis and cholera resistance?

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If you had to grade an exam question about oxidation-reduction reactions,you would give the most points if a student said that they

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Which of the following are examples of kinetic energy?

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Phagocytosis is an example of

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If a drug is designed to denature enzymes involved in digesting phenylalanine,why would patients treated with this drug develop phenylketonuria?

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The chemical formula for glucose is

Correct AnswerverifiedShow Answer

Oxidation-reduction reactions

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Studies of fireflies show that as they produce light,they constantly recycle ATP.Why might this be?

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Examples of potential energy include

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