Question 1

Plants require energy from light to perform photosynthesis in which glucose is formed from carbon dioxide and water.This is an example of

Accepted Answer

A)   a reaction that releases energy.
B)   kinetic energy.
C)   a reaction that takes up energy.
D)   potential energy.
E)   equilibrium.

Question 2

If a cell contains 95% water in its cytoplasm and the environment surrounding the cell contains 90% water will flow

Accepted Answer

A)   into the cell by osmosis.
B)   out of the cell by active transport.
C)   out of the cell by osmosis.
D)   into the cell by active transport.
E)   into the cell by facilitated diffusion.

Question 3

The amount of energy required to raise the temperature of one gram of water by one degree Celsius is a

Accepted Answer

A)   calorie.
B)   joule.
C)   kilocalorie.
D)   measure of density.
E)   measure of light.

Question 4

Energy sometimes appears spontaneously in living systems.

Accepted Answer

A) True 
 B)False

Question 5

Reduction is

Accepted Answer

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

Question 6

Changes in the tide level can cover plants and animals that would usually not be covered by seawater.The exposure to seawater would result in the cells

Accepted Answer

A)   bursting by osmosis of water.
B)   dehydrating by facilitated diffusion of salts.
C)   dehydrating by osmosis of water.
D)   bursting by active transport of salts.
E)   dehydrating by active transport of salts.

Question 7

In most cases,the chemical structure of enzymes represents a(an)

Accepted Answer

A)   carbohydrate.
B)   lipid.
C)   ion.
D)   protein.
E)   inorganic molecule.

Question 8

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 answer choices are correct.

Question 9

Which of the following statements is incorrect about turgor pressure?

Accepted Answer

A)   It occurs in organisms with cell walls when placed into a hypertonic environment.
B)   It is necessary to keep plants from wilting.
C)   It is the force of water against the inside of the cell wall.
D)   It is maintained by osmosis.
E)   It occurs organisms with cell walls when placed into a hypotonic environment.

Question 10

If you drop a rubber ball and it does not bounce back to the height you dropped it from.This is consistent with

Accepted Answer

A)   conversion of entropy into potential energy.
B)   energy being neither created nor destroyed.
C)   conversion of kinetic energy into potential energy.
D)   conversion of kinetic energy into entropy.
E)   the tendency to increase disorder.

Question 11

A ball at the top of a hill is an example of ________ and a ball rolling down the hill is an example of ________.

Accepted Answer

A)   potential energy; kinetic energy
B)   kinetic energy; potential energy
C)   exergonic reaction; endergonic reaction
D)   noncompetitive inhibition; competitive inhibition
E)   competitive inhibition; noncompetitive inhibition

Question 12

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 of the answer choices are correct.

Question 13

When electrons are removed from a food molecule,the molecule is

Accepted Answer

A)   reduced.
B)   in equilibrium.
C)   oxidized.
D)   polymerized.
E)   conducting an endergonic reaction.

Question 14

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.

Question 15

Noncompetitive 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.

Question 16

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.

Question 17

Some antibiotics target enzymes specific to bacteria.  Some work by binding to the active site and; therefore,act as noncompetitive inhibitors.

Accepted Answer

A) True 
 B)False

Question 18

The energy source that powers photosynthesis is

Accepted Answer

A)   water.
B)   glucose.
C)   carbon dioxide.
D)   sunlight.
E)   oxygen.

Question 19

Enzymes speed up chemical reactions.

Accepted Answer

A) True 
 B)False

Question 20

Phagocytosis is the process used by cells to bring in small amounts of fluid.

Accepted Answer

A) True 
 B)False

Exam 4: The Energy of Life

Some antibiotics target enzymes specific to bacteria. Some work by binding to the active site and; therefore,act as noncompetitive inhibitors.

Correct AnswerverifiedShow Answer

Energy sometimes appears spontaneously in living systems.

Correct AnswerverifiedShow Answer

Active transport is different from simple diffusion because active transport

Correct AnswerverifiedShow Answer

The amount of energy required to raise the temperature of one gram of water by one degree Celsius is a

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A ball at the top of a hill is an example of ________ and a ball rolling down the hill is an example of ________.

Correct AnswerverifiedShow Answer

Which of the following statements is incorrect about turgor pressure?

Correct AnswerverifiedShow Answer

Reduction is

Correct AnswerverifiedShow Answer

If you drop a rubber ball and it does not bounce back to the height you dropped it from.This is consistent with

Correct AnswerverifiedShow Answer

In most cases,the chemical structure of enzymes represents a(an)

Correct AnswerverifiedShow Answer

Which of the following are examples of potential energy?

Correct AnswerverifiedShow Answer

If a cell contains 95% water in its cytoplasm and the environment surrounding the cell contains 90% water will flow

Correct AnswerverifiedShow Answer

Plants require energy from light to perform photosynthesis in which glucose is formed from carbon dioxide and water.This is an example of

Correct AnswerverifiedShow Answer

Phagocytosis is the process used by cells to bring in small amounts of fluid.

Correct AnswerverifiedShow Answer

When electrons are removed from a food molecule,the molecule is

Correct AnswerverifiedShow Answer

The energy source that powers photosynthesis is

Correct AnswerverifiedShow Answer

Changes in the tide level can cover plants and animals that would usually not be covered by seawater.The exposure to seawater would result in the cells

Correct AnswerverifiedShow Answer

Cells use energy for which of the following?

Correct AnswerverifiedShow Answer

Noncompetitive inhibition of enzymes occurs

Correct AnswerverifiedShow Answer

Enzymes speed up chemical reactions.

Correct AnswerverifiedShow Answer

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A ball at the top of a hill is an example of and a ball rolling down the hill is an example of .

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