Question 1

Exergonic reactions do not require activation energy to get started since they release energy.

Accepted Answer

A) True 
 B)False

Question 2

If a person is poisoned with cyanide they cannot generate ATP and die within a few minutes.What would happen to sodium and potassium concentrations across a cell membrane?

Accepted Answer

A)  Sodium would be higher outside the cell and potassium would be higher inside the cell
B)  Sodium would be higher inside the cell and potassium would be higher outside the cell
C)  They would reach equilibrium
D)  Sodium and potassium concentrations would both be higher outside the cell
E)  Sodium and potassium concentrations would both be higher inside the cellF) All of the above
G) A) and B)

Question 3

Phagocytosis is:

Accepted Answer

A)  An example of exocytosis
B)  An example of active transport
C)  An example of diffusion
D)  An example of endocytosis
E)  An example of facilitated diffusionF) All of the above
G) B) and E)

Question 4

The first and second laws of thermodynamics apply to nonliving systems like gasoline engines but do not apply to reactions in living cells.

Accepted Answer

A) True 
 B)False

Question 5

What hypothesis were the scientists testing?

Accepted Answer

A)  Do defects in CFTR cause cholera
B)  Does defective CFTR make people more sensitive to cholera
C)  Does defective CFTR give people natural resistance to cholera
D)  Does cholera causes cystic fibrosis
E)  Does cholera increase the risk of transmission of cystic fibrosisF) A) and D)
G) B) and C)

Question 6

Sucrose is a disaccharide consisting of the monosaccharides:

Accepted Answer

A)  Fructose and glucose
B)  Glucose and glucose
C)  Galactose and fructose
D)  Glucose and galactoseE) None of the above
F) A) and B)

Question 7

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

Accepted Answer

A)  Endergonic
B)  Kinetic energy
C)  Exergonic
D)  Potential energy
E)  EquilibriumF) B) and D)
G) A) and D)

Question 8

A bowl of sugar water is very stable.But if you feed it to cells it is rapidly broken down into carbon dioxide and water.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 transportF) A) and D)
G) A) and C)

Question 9

How does the bacteria that causes cholera,Vibrio cholera,trigger potentially life threatening diarrhea?

Accepted Answer

A)  Cholera toxin stimulates CFTR leading to increased osmosis of water into the intestines
B)  Cholera toxin inhibits CFTR leading to increased osmosis of water into the intestines
C)  Cholera toxin stimulates CFTR leading to decreased osmosis of water into the intestines
D)  Cholera toxin inhibits CFTR leading to decreased osmosis of water into the intestinesE) B) and C)
F) A) and B)

Question 10

CFTR moves chloride ions out of cells by active transport.What can be inferred from this statement?

Accepted Answer

A)  Chloride concentrations are higher on the outside of the cell
B)  Chloride concentrations are higher on the inside of the cell
C)  Sodium concentrations are higher on the outside of the cell
D)  Sodium concentrations are higher on the inside of the cell
E)  Water crosses membranes by osmosisF) A) and C)
G) A) and B)

Question 11

An enzyme is a protein that catalyzes chemical reactions.

Accepted Answer

A) True 
 B)False

Question 12

Which condition in the environment of the cell would affect the charge on amino acids in the active site of an enzyme?

Accepted Answer

A)  Temperature
B)  Salt concentration
C)  pH
D)  Antibiotics
E)  Substrate concentrationF) A) and B)
G) B) and D)

Question 13

If a cell has a 95% concentration of water in its cytoplasm and the environment surrounding the cell has a 90% concentration of water:

Accepted Answer

A)  Water will flow into the cell by osmosis
B)  Water will flow out of the cell by active transport
C)  Water will flow out of the cell by osmosis
D)  Water will flow into the cell by active transport
E)  Water will flow into the cell by facilitated diffusionF) A) and D)
G) B) and E)

Question 14

Which of the following are examples of kinetic energy?

Accepted Answer

A)  Electrons moving through the electron transport chain, and protons moving through ATPase
B)  Electrons in chemical bonds, proton gradient, ATP
C)  Electrons moving through electron transport chain, proton gradient
D)  Protons moving through ATPase, ATP
E)  All are correctF) D) and E)
G) None of the above

Question 15

The chemical formula for glucose is:

Accepted Answer

A)  C6H6O6
B)  C12H6O12
C)  C12H22O11
D)  C6H6O12
E)  C6H12O6F) A) and E)
G) B) and E)

Question 16

Entropy is:

Accepted Answer

A)  Order
B)  Complexity
C)  Disorder
D)  Both order and disorder are correct
E)  Both complexity and disorder are correctF) B) and E)
G) B) and D)

Question 17

An enzyme:

Accepted Answer

A)  Is not catalytic
B)  Is not necessary to sustain life in a cell
C)  Both A and B are correct
D)  Is a protein
E)  Both A and C are correctF) A) and B)
G) A) and C)

Question 18

One way to produce a vaccine is to heat a virus or bacteria and then inject the inactive pathogen as a vaccination.How would the heat inactivate a virus?

Accepted Answer

A)  All are correct
B)  By inhibiting its metabolism
C)  By destroying the membrane
D)  By blocking facilitated diffusion
E)  By denaturing proteinsF) B) and D)
G) A) and B)

Question 19

Reduction means:

Accepted Answer

A)  The gain of oxygen by a cell
B)  The loss of oxygen from a cell
C)  The gain of electrons by a molecule
D)  The loss of electrons by a moleculeE) All of the above
F) A) and D)

Question 20

Which of the following is not an example of kinetic energy?

Accepted Answer

A)  Heat
B)  Light
C)  Sound
D)  The energy in chemical bonds
E)  Random molecular movementF) A) and B)
G) A) and C)

Exam 4: The Energy of Life

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

Correct AnswerverifiedShow Answer

Reduction means:

Correct AnswerverifiedShow Answer

If a person is poisoned with cyanide they cannot generate ATP and die within a few minutes.What would happen to sodium and potassium concentrations across a cell membrane?

Correct AnswerverifiedShow Answer

CFTR moves chloride ions out of cells by active transport.What can be inferred from this statement?

Correct AnswerverifiedShow Answer

What hypothesis were the scientists testing?

Correct AnswerverifiedShow Answer

Phagocytosis is:

Correct AnswerverifiedShow Answer

An enzyme is a protein that catalyzes chemical reactions.

Correct AnswerverifiedShow Answer

If a cell has a 95% concentration of water in its cytoplasm and the environment surrounding the cell has a 90% concentration of water:

Correct AnswerverifiedShow Answer

Entropy is:

Correct AnswerverifiedShow Answer

Exergonic reactions do not require activation energy to get started since they release energy.

Correct AnswerverifiedShow Answer

The chemical formula for glucose is:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

An enzyme:

Correct AnswerverifiedShow Answer

Which condition in the environment of the cell would affect the charge on amino acids in the active site of an enzyme?

Correct AnswerverifiedShow Answer

Sucrose is a disaccharide consisting of the monosaccharides:

Correct AnswerverifiedShow Answer

Which of the following is not an example of kinetic energy?

Correct AnswerverifiedShow Answer

The first and second laws of thermodynamics apply to nonliving systems like gasoline engines but do not apply to reactions in living cells.

Correct AnswerverifiedShow Answer

How does the bacteria that causes cholera,Vibrio cholera,trigger potentially life threatening diarrhea?

Correct AnswerverifiedShow Answer

One way to produce a vaccine is to heat a virus or bacteria and then inject the inactive pathogen as a vaccination.How would the heat inactivate a virus?

Correct AnswerverifiedShow Answer

Which of the following are examples of kinetic energy?

Correct AnswerverifiedShow Answer

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