Question 1

Simple diffusion

Accepted Answer

A)   requires energy.
B)   utilizes proteins to move molecules across a membrane.
C)   moves molecules against a concentration gradient.
D)   cannot occur without a membrane present.
E)   does not require energy.F) A) and E)
G) A) and D)

Question 2

Enzymes speed chemical reactions by

Accepted Answer

A)   lowering the amount of reactants that are needed.
B)   maintaining temperature.
C)   lowering the energy required to start a chemical reaction.
D)   raising the temperature of the surroundings.
E)   supplying energy to the reaction process.F) A) and E)
G) A) and D)

Question 3

Which statement is not directly connected with the law about energy being conserved?

Accepted Answer

A)   The amount of energy in the universe is constant.
B)   Energy cannot be created or destroyed.
C)   Energy can be converted to other forms of energy.
D)   Any energy transformation loses some energy to its surroundings as heat.
E)   None of the answers are correct.F) C) and D)
G) A) and D)

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

If a lion eats a gazelle,before the molecules have been broken down by its cells,the lion has gained

Accepted Answer

A)   potential energy.
B)   kinetic energy.
C)   entropy.
D)   respiratory capacity.
E)   enzymes for digesting grass.F) B) and E)
G) A) and E)

Question 6

Oxidation is

Accepted Answer

A)   the gain of oxygen by a cell.
B)   the loss of electrons from an atom or molecule.
C)   the loss of oxygen from a cell.
D)   the gain of electrons by an atom or molecule.
E)   the loss of protons by an atom or molecule.F) A) and C)
G) All of the above

Question 7

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 D)
G) A) and E)

Question 8

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 ATP.
E)   equilibrium.F) A) and E)
G) D) and E)

Question 9

In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," which infection did researchers hypothesize that the CFTR protected cystic fibrosis patients against?

Accepted Answer

A)   pneumonia
B)   malaria
C)   staph
D)   strep throat
E)   choleraF) C) and D)
G) A) and D) E

Question 10

Competitive inhibition of enzymes occurs

Accepted Answer

A)   when a substance other than the correct substrate binds at the active site of an enzyme.
B)   when a substance binds to an enzyme at a site away from the active site.
C)   by denaturation of an enzyme.
D)   by blocking the production of an enzyme.
E)   when two enzymes bind together.F) A) and B)
G) C) and D)

Question 11

The reactants of photosynthesis are

Accepted Answer

A)   water and carbon dioxide.
B)   organic compounds.
C)   glucose and water.
D)   glucose and carbon dioxide.
E)   glucose and sunlight.F) C) and E)
G) C) and D)

Question 12

Entropy is a measurement of

Accepted Answer

A)   order.
B)   complexity.
C)   disorder.
D)   organizing potential. 
E)   None of the answer choices are correct.F) All of the above
G) A) and E)

Question 13

The chloroplasts in plant cells create energy.

Accepted Answer

A) True 
 B)False

Question 14

The diffusion of water across a selectively permeable membrane is

Accepted Answer

A)   facilitated diffusion.
B)   active transport.
C)   a rare occurrence.
D)   osmosis.
E)   always beneficial to a cell.F) A) and B)
G) A) and E)

Question 15

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) D) and E)
G) A) and C) C

Question 16

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 C)
G) A) and B)

Question 17

Enzymes speed up reactions by lowering the activation energy of a reaction.This is analogous with

Accepted Answer

A)   reducing the force a ball needs to start rolling down a hill.
B)   increasing the height an apple will fall from a tree.
C)   blocking a flowing river with a dam to stop the flow.
D)   causing a snow storm in the middle of summer when temperatures are hot.
E)   All answers are correct.F) A) and C)
G) A) and E)

Question 18

Potential energy is the energy of motion.

Accepted Answer

A) True 
 B)False

Question 19

Reactions that break down substrates do not release any energy because enzymes are used.

Accepted Answer

A) True 
 B)False  False

Question 20

In which case is the energy involved farthest from being kinetic energy?

Accepted Answer

A)   heat
B)   light
C)   sound
D)   the energy in chemical bonds
E)   random molecular movementF) A) and E)
G) None of the above

Exam 4: The Energy of Life

Simple diffusion

Correct AnswerverifiedShow Answer

Enzymes speed chemical reactions by

Correct AnswerverifiedShow Answer

Which statement is not directly connected with the law about energy being conserved?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

If a lion eats a gazelle,before the molecules have been broken down by its cells,the lion has gained

Correct AnswerverifiedShow Answer

Oxidation is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Does Natural Selection Maintain Cystic Fibrosis?," which infection did researchers hypothesize that the CFTR protected cystic fibrosis patients against?

Correct AnswerverifiedE

Competitive inhibition of enzymes occurs

Correct AnswerverifiedShow Answer

The reactants of photosynthesis are

Correct AnswerverifiedShow Answer

Entropy is a measurement of

Correct AnswerverifiedShow Answer

The chloroplasts in plant cells create energy.

Correct AnswerverifiedShow Answer

The diffusion of water across a selectively permeable membrane is

Correct AnswerverifiedShow Answer

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 AnswerverifiedC

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

Correct AnswerverifiedShow Answer

Enzymes speed up reactions by lowering the activation energy of a reaction.This is analogous with

Correct AnswerverifiedShow Answer

Potential energy is the energy of motion.

Correct AnswerverifiedShow Answer

Reactions that break down substrates do not release any energy because enzymes are used.

Correct AnswerverifiedFalse

In which case is the energy involved farthest from being kinetic energy?

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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E

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C

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False

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