Question 1

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) B) and C)
G) C) and D)

Question 2

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 answers are correct.F) A) and D)
G) A) and E)

Question 3

Dye placed at one end of a beaker of otherwise pure water will

Accepted Answer

A)  diffuse towards the other side.
B)  remain in place.
C)  slowly bleach.
D)  form crystals.
E)  No answer is correct.F) A) and D)
G) C) and D)

Question 4

After ATP donates a phosphate group to a coupled reaction,then it becomes ADP.The ADP

Accepted Answer

A)  can be recharged with the release of energy to form ATP.
B)  is a waste product that will be broken down.
C)  can be recharged in an equilibrium reaction to form ATP.
D)  can be recharged in an oxidation reaction to form ATP.
E)  can be recharged with the uptake of energy to form ATP.F) A) and E)
G) A) and B)

Question 5

Phagocytosis is a process that cells primarily use to obtain nutrients.

Accepted Answer

A) True 
 B)False

Question 6

In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," if two carriers of the defective CFTR gene have a child,what is the probability that the child will have cystic fibrosis?

Accepted Answer

A)  75%
B)  50%
C)  100%
D)  0%
E)  25%F) B) and C)
G) A) and E)

Question 7

Enzymes speed up chemical reactions.

Accepted Answer

A) True 
 B)False

Question 8

When NaCl (table salt) forms,sodium (Na) loses energy by ______ and chlorine (Cl) gains energy by ______.

Accepted Answer

A)  giving up an electron in oxidation;gaining an electron in reduction
B)  going with its concentration gradient;going against its concentration gradient
C)  going against its concentration gradient;going with its concentration gradient
D)  gaining an electron in oxidation;by giving up an electron in reduction
E)  gaining an electron in reduction;giving up an electron in oxidationF) A) and C)
G) B) and D)

Question 9

During high tide,a plant or animal would be at risk of

Accepted Answer

A)  bursting by osmosis of water.
B)  dehydration by facilitated diffusion of salts.
C)  dehydration by osmosis of water.
D)  bursting by active transport of salts.
E)  dehydration by active transport of salts.F) A) and C)
G) A) and E)

Question 10

When the concentration gradient driving osmosis becomes larger,osmosis occurs at a faster rate.

Accepted Answer

A) True 
 B)False

Question 11

The CFTR receptor moves chloride ions out of a cell by active transport.This is an example of

Accepted Answer

A)  a reaction coupled with the production of ATP.
B)  an oxidation reaction.
C)  a reduction reaction.
D)  a reaction requiring the input of energy (ATP) .
E)  equilibrium.F) A) and C)
G) A) and E)

Question 12

The wood in a match is made of cellulose,a polymer of glucose molecules.When you light the match heat and light are given off,indicating that a(n) ________ reaction is occurring.

Accepted Answer

A)  endergonic
B)  kinetic energy
C)  exergonic
D)  potential energy
E)  equilibriumF) C) and D)
G) B) and E)

Question 13

Cells use energy for which of the following?

Accepted Answer

A)  to do work
B)  to synthesize proteins
C)  to expel waste
D)  to move substances across membranes
E)  All answers are correct.F) All of the above
G) A) and D)

Question 14

If you were working with a 3D model of an enzyme,and you had found a part representing a molecule that fits into the active site,you would have found something that is

Accepted Answer

A)  always a protein.
B)  an analog.
C)  always a carbohydrate.
D)  a substrate.
E)  always broken down by the enzymE.F) C) and E)
G) C) and D)

Question 15

Which of the following are examples of potential energy?

Accepted Answer

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

Question 16

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

Accepted Answer

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

Question 17

Active transport is different from simple diffusion because active transport

Accepted Answer

A)  requires energy.
B)  moves molecules against a concentration gradient.
C)  requires the use of proteins embedded within the cell membrane.
D)  moves molecules from an area of lower concentration to an area of higher concentration.
E)  All answers are correct.F) B) and E)
G) C) and D)

Question 18

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 E)
G) B) and C)

Question 19

Diffusion occurs against concentration gradients.

Accepted Answer

A) True 
 B)False

Question 20

Entropy is

Accepted Answer

A)  order.
B)  complexity.
C)  disorder.
D)  organizing potential.
E)  No answer is correct.F) C) and D)
G) A) and E)

Exam 4: The Energy of Life

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

Correct AnswerverifiedShow Answer

Entropy is

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If you were working with a 3D model of an enzyme,and you had found a part representing a molecule that fits into the active site,you would have found something that is

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," if two carriers of the defective CFTR gene have a child,what is the probability that the child will have cystic fibrosis?

Correct AnswerverifiedShow Answer

The CFTR receptor moves chloride ions out of a cell by active transport.This is an example of

Correct AnswerverifiedShow Answer

Active transport is different from simple diffusion because active transport

Correct AnswerverifiedShow Answer

Which of the following are examples of kinetic energy?

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Cells use energy for which of the following?

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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

Correct AnswerverifiedShow Answer

Phagocytosis is a process that cells primarily use to obtain nutrients.

Correct AnswerverifiedShow Answer

Diffusion occurs against concentration gradients.

Correct AnswerverifiedShow Answer

Dye placed at one end of a beaker of otherwise pure water will

Correct AnswerverifiedShow Answer

When NaCl (table salt) forms,sodium (Na) loses energy by ______ and chlorine (Cl) gains energy by ______.

Correct AnswerverifiedShow Answer

After ATP donates a phosphate group to a coupled reaction,then it becomes ADP.The ADP

Correct AnswerverifiedShow Answer

During high tide,a plant or animal would be at risk of

Correct AnswerverifiedShow Answer

Which of the following are examples of potential energy?

Correct AnswerverifiedShow Answer

When the concentration gradient driving osmosis becomes larger,osmosis occurs at a faster rate.

Correct AnswerverifiedShow Answer

Examples of potential energy include

Correct AnswerverifiedShow Answer

Enzymes speed up chemical reactions.

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The wood in a match is made of cellulose,a polymer of glucose molecules.When you light the match heat and light are given off,indicating that a(n) ________ reaction is occurring.

Correct AnswerverifiedShow Answer

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When NaCl (table salt) forms,sodium (Na) loses energy by and chlorine (Cl) gains energy by .

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