Question 1

Diffusion from a hypertonic solution to a hypotonic solution

Accepted Answer

A)  will occur until both solutions are isotonic. 
B)  will occur until both sides are hypotonic. 
C)  will occur until both sides are hypertonic. 
D)  will occur until the tonicities are reversed. 
E)  won't occur. 
A)  will occur until both solutions are isotonic. 
B)  will occur until both sides are hypotonic. 
C)  will occur until both sides are hypertonic. 
D)  will occur until the tonicities are reversed. 
E)  won't occur.

Question 2

Answer the questions by matching each word or groups of words with its appropriate question number.
 a.active site
b.adenosine triphosphate 
c.electron transfer chain
d.denaturation
e.feedback inhibition
f.phosphorylation
g.enzyme
h.cofactor
-part of the enzyme that is specific for the reaction it will catalyze

Accepted Answer

The answer of Answer the questions by matching each word...

Question 3

Which of the following statements is CORRECT about the nature of enzymes?

Accepted Answer

A)  All enzymes are proteins. 
B)  Most enzymes are RNAs. 
C)  Some enzymes are carbohydrates. 
D)  Most enzymes are proteins, but some are RNAs. 
E)  Most enzymes are proteins, but some are carbohydrates. 
A)  All enzymes are proteins. 
B)  Most enzymes are RNAs. 
C)  Some enzymes are carbohydrates. 
D)  Most enzymes are proteins, but some are RNAs. 
E)  Most enzymes are proteins, but some are carbohydrates.

Question 4

Which of the following solutions has the potential to diffuse the fastest?

Accepted Answer

A)  one with large molecules as opposed to smaller ones 
B)  one with a higher concentration of molecules as opposed to one with a lesser concentration 
C)  one under low pressure as opposed to one under high pressure 
D)  one at a low temperature as opposed to one at a higher temperature 
E)  all of these have the potential to diffuse equally fast 
A)  one with large molecules as opposed to smaller ones 
B)  one with a higher concentration of molecules as opposed to one with a lesser concentration 
C)  one under low pressure as opposed to one under high pressure 
D)  one at a low temperature as opposed to one at a higher temperature 
E)  all of these have the potential to diffuse equally fast

Question 5

ADH Reaction
Consider the reaction below,and answer the following question(s).ADH stands for alcohol dehydrogenase.
  
-In this reaction,acetaldehyde represents the

Accepted Answer

A)  enzyme. 
B)  substrate. 
C)  product. 
D)  activation energy. 
E)  trigger. 
A)  enzyme. 
B)  substrate. 
C)  product. 
D)  activation energy. 
E)  trigger.

Question 6

A concentration gradient ceases to exist when

Accepted Answer

A)  all molecules have moved from low concentration to high concentration. 
B)  the membrane pores close. 
C)  the temperature drops. 
D)  there is equilibrium between the two sides of a membrane. 
E)  bulk flow intervenes. 
A)  all molecules have moved from low concentration to high concentration. 
B)  the membrane pores close. 
C)  the temperature drops. 
D)  there is equilibrium between the two sides of a membrane. 
E)  bulk flow intervenes.

Question 7

Substances that enter a reaction are termed

Accepted Answer

A)  intermediates. 
B)  enzymes. 
C)  energy carriers. 
D)  reactants. 
E)  end products. 
A)  intermediates. 
B)  enzymes. 
C)  energy carriers. 
D)  reactants. 
E)  end products.

Question 8

A red blood cell may burst when placed in which of the following kinds of solutions?

Accepted Answer

A)  hypertonic 
B)  hypotonic 
C)  isotonic 
D)  any of these 
E)  none of these 
A)  hypertonic 
B)  hypotonic 
C)  isotonic 
D)  any of these 
E)  none of these

Question 9

Answer the questions by matching each word or groups of words with its appropriate question number.
 a.active site
b.adenosine triphosphate 
c.electron transfer chain
d.denaturation
e.feedback inhibition
f.phosphorylation
g.enzyme
h.cofactor
-often a vitamin or mineral that improves enzyme functioning

Accepted Answer

The answer of Answer the questions by matching each word...

Question 10

The sodium-potassium pump is used in

Accepted Answer

A)  facilitated diffusion. 
B)  simple diffusion. 
C)  active transport. 
D)  osmosis. 
E)  bulk flow. 
A)  facilitated diffusion. 
B)  simple diffusion. 
C)  active transport. 
D)  osmosis. 
E)  bulk flow.

Question 11

Answer the questions by matching each word or groups of words with the appropriate definition.
a.reactant
b.product
c.ATP
d.activation energy
e.reaction
f.phosphorylation
-minimum amount of energy required to start a reaction

Accepted Answer

The answer of Answer the questions by matching each word...

Question 12

If a single-celled freshwater organism such as a protistan is transferred to saltwater,which of the following is likely to happen?

Accepted Answer

A)  The cell bursts. 
B)  The cell shrinks. 
C)  Salt is pumped out of the cell. 
D)  Enzymes flow out of the cell. 
E)  There is no effect. 
A)  The cell bursts. 
B)  The cell shrinks. 
C)  Salt is pumped out of the cell. 
D)  Enzymes flow out of the cell. 
E)  There is no effect.

Question 13

In the conversion of electrical energy to light energy in a light bulb,how much is lost as heat energy?

Accepted Answer

A)  5 percent 
B)  15 percent 
C)  55 percent 
D)  75 percent 
E)  95 percent 
A)  5 percent 
B)  15 percent 
C)  55 percent 
D)  75 percent 
E)  95 percent

Question 14

Once glucose has entered a cell,what prevents it from diffusing back out of the cell?

Accepted Answer

A)  glucose pumps actively pump it back 
B)  one side of the cell membrane is permeable to glucose, but the other side is not 
C)  glucose inhibitors attach to glucose once it's in the cell 
D)  glucose is phosphorylated preventing it from leaving the cell 
E)  glucose is hydrolyzed into two three-carbon molecules that cannot diffuse in a reverse direction 
A)  glucose pumps actively pump it back 
B)  one side of the cell membrane is permeable to glucose, but the other side is not 
C)  glucose inhibitors attach to glucose once it's in the cell 
D)  glucose is phosphorylated preventing it from leaving the cell 
E)  glucose is hydrolyzed into two three-carbon molecules that cannot diffuse in a reverse direction

Question 15

Which of the following is NOT true of enzyme behavior?

Accepted Answer

A)  Enzyme shape may change during catalysis. 
B)  The active site of an enzyme orients its substrate molecules, thereby promoting interaction of their reactive parts. 
C)  All enzymes have an active site where substrates are temporarily bound. 
D)  Each enzyme can catalyze a wide variety of different reactions. 
E)  Enzymes make reactions occur at a faster rate. 
A)  Enzyme shape may change during catalysis. 
B)  The active site of an enzyme orients its substrate molecules, thereby promoting interaction of their reactive parts. 
C)  All enzymes have an active site where substrates are temporarily bound. 
D)  Each enzyme can catalyze a wide variety of different reactions. 
E)  Enzymes make reactions occur at a faster rate.

Question 16

ADH Reaction
Consider the reaction below,and answer the following question(s).ADH stands for alcohol dehydrogenase.
  
-In this reaction,ethanol represents the

Accepted Answer

A)  enzyme. 
B)  substrate. 
C)  product. 
D)  activation energy. 
E)  trigger. 
A)  enzyme. 
B)  substrate. 
C)  product. 
D)  activation energy. 
E)  trigger.

Question 17

Which of the following is NOT a type of transport protein involved in passive transport?

Accepted Answer

A)  a glucose transporter 
B)  an open channel 
C)  a gated channel 
D)  an ion pump 
E)  more than one of these 
A)  a glucose transporter 
B)  an open channel 
C)  a gated channel 
D)  an ion pump 
E)  more than one of these

Question 18

A substrate is another term for a(an)

Accepted Answer

A)  enzyme. 
B)  product. 
C)  reactant. 
D)  active site. 
E)  cofactors. 
A)  enzyme. 
B)  product. 
C)  reactant. 
D)  active site. 
E)  cofactors.

Question 19

Why do heavy consumers of alcohol gain weight?

Accepted Answer

A)  alcohol contains an excessive amount of calories 
B)  ethanol is converted directly to fat molecules 
C)  oxygen is diverted from breaking down fatty acids to break down ethanol 
D)  ethanol inhibits the action of peroxisomes which work to break down fatty acids 
E)  the hydroxyl group on ethanol is transferred to fatty acids causing them to be stored as fat 
A)  alcohol contains an excessive amount of calories 
B)  ethanol is converted directly to fat molecules 
C)  oxygen is diverted from breaking down fatty acids to break down ethanol 
D)  ethanol inhibits the action of peroxisomes which work to break down fatty acids 
E)  the hydroxyl group on ethanol is transferred to fatty acids causing them to be stored as fat

Question 20

The second law of thermodynamics holds that

Accepted Answer

A)  the energy of the universe is a constant. 
B)  energy can be neither created nor destroyed. 
C)  energy disperses spontaneously. 
D)  energy transformations create a more orderly universe. 
E)  energy and matter are the same thing. 
A)  the energy of the universe is a constant. 
B)  energy can be neither created nor destroyed. 
C)  energy disperses spontaneously. 
D)  energy transformations create a more orderly universe. 
E)  energy and matter are the same thing.

Exam 4: Energy and Metabolism

Diffusion from a hypertonic solution to a hypotonic solution

Which of the following statements is CORRECT about the nature of enzymes?

Which of the following solutions has the potential to diffuse the fastest?

ADH Reaction Consider the reaction below,and answer the following question(s).ADH stands for alcohol dehydrogenase. -In this reaction,acetaldehyde represents the

A concentration gradient ceases to exist when

Substances that enter a reaction are termed

A red blood cell may burst when placed in which of the following kinds of solutions?

The sodium-potassium pump is used in

Answer the questions by matching each word or groups of words with the appropriate definition. a.reactant b.product c.ATP d.activation energy e.reaction f.phosphorylation -minimum amount of energy required to start a reaction

If a single-celled freshwater organism such as a protistan is transferred to saltwater,which of the following is likely to happen?

In the conversion of electrical energy to light energy in a light bulb,how much is lost as heat energy?

Once glucose has entered a cell,what prevents it from diffusing back out of the cell?

Which of the following is NOT true of enzyme behavior?

ADH Reaction Consider the reaction below,and answer the following question(s).ADH stands for alcohol dehydrogenase. -In this reaction,ethanol represents the

Which of the following is NOT a type of transport protein involved in passive transport?

A substrate is another term for a(an)

Why do heavy consumers of alcohol gain weight?

The second law of thermodynamics holds that

Invitation to Biology

Molecules of Life

Cell Structure

Capturing and Releasing Energy

DNA Structure and Function

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Early Life Forms and the Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Reproduction and Development

Plant Form and Function

Plant Reproduction and Development

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