Question 1

A piece of meat and a piece of fruit are fed to both a lizard and a person.The extent to which these foods are digested by digestive enzymes along these two gastrointestinal tracts varies.Which of the following is not a reason for the variation in digestion?

Accepted Answer

A)  pH of the digestive organs
B)  body temperature
C)  variation in enzymes produced
D)  the amount of protein in the meat and fruit
E)  bacteria present in the digestive tractF) A) and E)
G) B) and C)

Question 2

The term "metabolism" refers to all of the chemical reactions that occur in a cell.

Accepted Answer

A) True 
 B)False

Question 3

Define the first law of thermodynamics.

Accepted Answer

The first law of thermodynamic...

Question 4

The function of an enzyme is to

Accepted Answer

A)  provide the energy for metabolic reactions.
B)  increase the rate of a metabolic reaction.
C)  change the direction of metabolic reactions.
D)  act as a buffer in metabolic reactions.
E)  raise the energy of activation for a reaction.F) B) and E)
G) B) and D)

Question 5

During cellular respiration,what is reduced?

Accepted Answer

A)  glucose
B)  oxygen
C)  carbon dioxide
D)  water
E)  ATP (energy) F) C) and D)
G) A) and B)

Question 6

Which of the following is a by-product of photosynthesis?

Accepted Answer

A)  carbon dioxide
B)  water
C)  oxygen
D)  glucose
E)  energyF) All of the above
G) A) and B)

Question 7

In feedback inhibition of a metabolic pathway,where does the inhibitor bind?

Accepted Answer

A)  to the substrate of the first reaction
B)  to the product of the first reaction
C)  to the enzyme of the first reaction
D)  to the enzyme of the last reaction
E)  to a substrate or the product of the last reactionF) B) and D)
G) B) and E)

Question 8

Because the inside of a cell is more organized than the outside,the inside of the cell has increased entropy.

Accepted Answer

A) True 
 B)False

Question 9

Chloroplasts and mitochondria are involved in a redox cycle because

Accepted Answer

A)  carbon dioxide is reduced during photosynthesis and carbohydrates are oxidized during cellular respiration.
B)  both use carbon dioxide.
C)  photosynthesis uses energy and cellular respiration releases energy.
D)  both are required to be in all cells.
E)  energy cycles between the two organelles.F) C) and E)
G) A) and B)

Question 10

During an enzymatic reaction,what happens to the enzyme?

Accepted Answer

A)  It becomes the product.
B)  It becomes the substrate.
C)  It is used up.
D)  The enzyme and the substrate form a permanent complex.
E)  The enzyme and the substrate form a temporary complex.F) B) and D)
G) C) and E)

Question 11

Occasionally someone claims to have built a machine that can run forever,producing as much energy as it consumes.This has always been disproved because it violates

Accepted Answer

A)  the first law of thermodynamics.
B)  the second law of thermodynamics.
C)  entropy.
D)  laws preventing any conversion between types of energy.
E)  coupled reaction equations.F) B) and E)
G) A) and B)

Question 12

If an enzymatic reaction was controlled by feedback inhibition,we would expect it to stop

Accepted Answer

A)  only if the substrate was exhausted.
B)  when the cofactors are exhausted.
C)  when the product changed the pH.
D)  as soon as a critical level of end product builds up.
E)  only if a metabolic poison is added.F) C) and D)
G) C) and E)

Question 13

Cells are not as efficient in their use of energy as gasoline engines.

Accepted Answer

A) True 
 B)False

Question 14

Most cells use a tremendous amount of ATP,

Accepted Answer

A)  so our bodies therefore produce and maintain a huge amount of ATP in storage.
B)  but only a little ATP is needed because it is an enzyme and does not participate in a reaction.
C)  but the amount of stored ATP is not great because our body constantly generates ATP from ADP + P.
D)  mainly because ATP is not very efficient as an energy currency.
E)  but only for chemical work; transport and mechanical work must use transport and mechanical molecules.F) All of the above
G) None of the above

Question 15

Which of the following is an example of chemical work within a cell?

Accepted Answer

A)  catabolism
B)  anabolism
C)  moving glucose across the cell membrane
D)  the beating of cilia
E)  the contraction of muscle fibersF) C) and D)
G) A) and E)

Question 16

Where within the cell is ATP built up?

Accepted Answer

A)  mitochondria
B)  cytoplasm
C)  nucleus
D)  endoplasmic reticulum
E)  Golgi bodyF) C) and E)
G) A) and C)

Question 17

The amount of energy available to do work after a chemical reaction has occurred is called

Accepted Answer

A)  entropy.
B)  metabolic energy.
C)  potential energy.
D)  kinetic energy.
E)  free energy.F) A) and B)
G) A) and C)

Question 18

ATP contains

Accepted Answer

A)  an adenine base and one phosphate group.
B)  an adenine base and two phosphate groups.
C)  an adenine base and three phosphate groups.
D)  an adenine base,a ribose sugar,and two phosphate groups.
E)  an adenine base,a ribose sugar,and three phosphate groups.F) None of the above
G) A) and B)

Question 19

The various uses of ATP include all of the following except

Accepted Answer

A)  being a structural component of the cell membrane.
B)  chemical work.
C)  mechanical work.
D)  transport work.
E)  moving substances into a cell.F) All of the above
G) A) and D)

Question 20

When a cell uses substantial energy to organize its cell contents to a greater degree than the organization that exists outside the living cell,

Accepted Answer

A)  energy has been created.
B)  entropy has increased.
C)  entropy has decreased.
D)  entropy remains the same.
E)  energy has been destroyed.F) All of the above
G) B) and E)

Exam 6: Metabolism: Energy and Enzymes

Where within the cell is ATP built up?

Correct AnswerverifiedShow Answer

Occasionally someone claims to have built a machine that can run forever,producing as much energy as it consumes.This has always been disproved because it violates

Correct AnswerverifiedShow Answer

The amount of energy available to do work after a chemical reaction has occurred is called

Correct AnswerverifiedShow Answer

Define the first law of thermodynamics.

Correct AnswerverifiedThe first law of thermodynamic...View AnswerShow Answer

During an enzymatic reaction,what happens to the enzyme?

Correct AnswerverifiedShow Answer

During cellular respiration,what is reduced?

Correct AnswerverifiedShow Answer

ATP contains

Correct AnswerverifiedShow Answer

Because the inside of a cell is more organized than the outside,the inside of the cell has increased entropy.

Correct AnswerverifiedShow Answer

Most cells use a tremendous amount of ATP,

Correct AnswerverifiedShow Answer

Chloroplasts and mitochondria are involved in a redox cycle because

Correct AnswerverifiedShow Answer

A piece of meat and a piece of fruit are fed to both a lizard and a person.The extent to which these foods are digested by digestive enzymes along these two gastrointestinal tracts varies.Which of the following is not a reason for the variation in digestion?

Correct AnswerverifiedShow Answer

If an enzymatic reaction was controlled by feedback inhibition,we would expect it to stop

Correct AnswerverifiedShow Answer

Cells are not as efficient in their use of energy as gasoline engines.

Correct AnswerverifiedShow Answer

Which of the following is an example of chemical work within a cell?

Correct AnswerverifiedShow Answer

When a cell uses substantial energy to organize its cell contents to a greater degree than the organization that exists outside the living cell,

Correct AnswerverifiedShow Answer

The term "metabolism" refers to all of the chemical reactions that occur in a cell.

Correct AnswerverifiedShow Answer

In feedback inhibition of a metabolic pathway,where does the inhibitor bind?

Correct AnswerverifiedShow Answer

Which of the following is a by-product of photosynthesis?

Correct AnswerverifiedShow Answer

The various uses of ATP include all of the following except

Correct AnswerverifiedShow Answer

The function of an enzyme is to

Correct AnswerverifiedShow Answer

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The first law of thermodynamic...
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