Question 1

When an end product of a reaction pathway is in excess and inhibits the first enzyme of the pathway,this is an example of negative feedback.

Accepted Answer

A) True 
 B)False

Question 2

Scurvy is caused by a deficiency of:

Accepted Answer

A)  Niacin
B)  Vitamin B1
C)  Minerals
D)  None are correct
E)  Vitamin CF) A) and E)
G) D) and E)

Question 3

Oxidation-reduction reactions:

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 cellF) A) and B)
G) B) and E)

Question 4

A reason that some antibiotics harm bacteria but not humans is because the antibiotic inhibits bacterial enzymes that humans do not have.

Accepted Answer

A) True 
 B)False

Question 5

Active transport is different from simple diffusion in that active transport:

Accepted Answer

A)  Requires energy
B)  Moves molecules against a concentration gradient
C)  Requires proteins embedded within the cell membrane
D)  Moves molecules from an area of lower concentration to an area of higher concentration
E)  All are correctF) B) and D)
G) A) and B)

Question 6

The region of an enzyme that catalyzes reactions is called:

Accepted Answer

A)  An active site
B)  A binding pocket
C)  A reaction site
D)  A catalyst site
E)  An analogF) A) and C)
G) A) and B)

Question 7

Which statement is not part of the first law of thermodynamics?

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 these are correctF) All of the above
G) C) and D)

Question 8

If you drop a rubber ball it doesn't bounce back to the height you dropped it from.This is consistent with:

Accepted Answer

A)  Conversion of entropy into potential energy
B)  The first law of thermodynamics
C)  Conversion of kinetic energy into potential energy
D)  Conversion of kinetic energy into entropy
E)  The second law of thermodynamicsF) A) and B)
G) All of the above

Question 9

Diffusion occurs naturally as it ___ of a system.

Accepted Answer

A)  Decreases the kinetic energy
B)  Increases the entropy
C)  Increases the potential energy
D)  Decreases the equilibrium
E)  All are correctF) C) and D)
G) A) and E)

Question 10

When electrons are removed from a food molecule it is:

Accepted Answer

A)  Being reduced
B)  In equilibrium
C)  Being oxidized
D)  An exergonic reaction
E)  An endergonic reactionF) C) and D)
G) B) and E)

Question 11

In which type of metabolic pathway is the product of the last reaction also the starting material of the first?

Accepted Answer

A)  A straight chain
B)  A cycle
C)  A branched chain
D)  This is impossibleE) A) and D)
F) None of the above

Question 12

The CFTR receptor is used to move 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 coupled with the hydrolysis of ATP
E)  EquilibriumF) All of the above
G) B) and C)

Question 13

Whenever ATP is produced by a chemical reaction some energy is lost into the surroundings as heat.

Accepted Answer

A) True 
 B)False

Question 14

Diffusion occurs naturally as it ___ of a system.

Accepted Answer

A)  Decreases the kinetic energy
B)  Increases the potential energy
C)  Increases the entropy
D)  Decreases the equilibrium
E)  All are correctF) All of the above
G) C) and D)

Question 15

One in 25 Caucasians is a carrier for the defective CFTR gene,making it the most common genetic disease in this population.Why would the frequency of defects in CFTR be so common in this population?

Accepted Answer

A)  Carriers with one copy of the defective CFTR gene have decreased resistance to cholera compared to those with no defective copies
B)  These individuals were exposed to cholera, causing mutations in their CFTR gene that can then be passed on to their children
C)  Carriers will be more likely to have children who develop cystic fibrosis
D)  Carriers with one copy of the defective CFTR gene have increased resistance to cholera compared to those with no defective copies
E)  Only carriers would be able to survive exposure to choleraF) C) and D)
G) A) and C)

Question 16

A contractile vacuole is not:

Accepted Answer

A)  Used to pump water into a cell
B)  Found in Paramecium
C)  Used to pump water out of a cell
D)  An organelle
E)  None of these are correctF) A) and E)
G) A) and D)

Question 17

An endergonic reaction is a reaction that:

Accepted Answer

A)  Requires an input of energy
B)  That typically builds complex molecules from smaller molecules
C)  Releases energy to its surroundings
D)  Both releases energy to its surroundings and typically build complex molecules from smaller molecules are correct
E)  Both requires an input of energy and typically builds complex molecules from smaller molecules are correctF) C) and E)
G) A) and B)

Question 18

Once ATP donates its phosphate to a coupled reaction it becomes ADP.The ADP:

Accepted Answer

A)  Can be recharged in an exergonic reaction to form ATP
B)  Is a waste product that must 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 in an endergonic reaction to form ATPF) B) and C)
G) C) and D)

Question 19

Plants require light to perform photosynthesis in which glucose is formed from carbon dioxide and water.This is a _____ reaction.

Accepted Answer

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

Question 20

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 energyF) A) and B)
G) B) and C)

Exam 4: The Energy of Life

Oxidation-reduction reactions:

Correct AnswerverifiedShow Answer

Simple diffusion:

Correct AnswerverifiedShow Answer

When an end product of a reaction pathway is in excess and inhibits the first enzyme of the pathway,this is an example of negative feedback.

Correct AnswerverifiedShow Answer

The CFTR receptor is used to move chloride ions out of a cell by active transport.This is an example of:

Correct AnswerverifiedShow Answer

Whenever ATP is produced by a chemical reaction some energy is lost into the surroundings as heat.

Correct AnswerverifiedShow Answer

Plants require light to perform photosynthesis in which glucose is formed from carbon dioxide and water.This is a _____ reaction.

Correct AnswerverifiedShow Answer

A reason that some antibiotics harm bacteria but not humans is because the antibiotic inhibits bacterial enzymes that humans do not have.

Correct AnswerverifiedShow Answer

An endergonic reaction is a reaction that:

Correct AnswerverifiedShow Answer

Once ATP donates its phosphate to a coupled reaction it becomes ADP.The ADP:

Correct AnswerverifiedShow Answer

Diffusion occurs naturally as it ___ of a system.

Correct AnswerverifiedShow Answer

Diffusion occurs naturally as it ___ of a system.

Correct AnswerverifiedShow Answer

When electrons are removed from a food molecule it is:

Correct AnswerverifiedShow Answer

In which type of metabolic pathway is the product of the last reaction also the starting material of the first?

Correct AnswerverifiedShow Answer

If you drop a rubber ball it doesn't bounce back to the height you dropped it from.This is consistent with:

Correct AnswerverifiedShow Answer

Scurvy is caused by a deficiency of:

Correct AnswerverifiedShow Answer

One in 25 Caucasians is a carrier for the defective CFTR gene,making it the most common genetic disease in this population.Why would the frequency of defects in CFTR be so common in this population?

Correct AnswerverifiedShow Answer

Active transport is different from simple diffusion in that active transport:

Correct AnswerverifiedShow Answer

A contractile vacuole is not:

Correct AnswerverifiedShow Answer

The region of an enzyme that catalyzes reactions is called:

Correct AnswerverifiedShow Answer

Which statement is not part of the first law of thermodynamics?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified