Question 1

The presence of an enzyme within a chemical system

Accepted Answer

A)  increases activation energy.
B)  decreases activation energy.
C)  increases potential energy.
D)  does not affect either activation energy or potential energy.E) B) and D)
F) A) and B)

Question 2

In a chemical reaction where an electron is exchanged from one reactant to another,the structure that loses an electron is

Accepted Answer

A)  analyzed.
B)  catalyzed.
C)  oxidized.
D)  reduced.E) A) and D)
F) All of the above

Question 3

Lactase is an enzyme that digests lactose.

Accepted Answer

A) True 
 B)False

Question 4

The optimal pH range for most human enzymes is

Accepted Answer

A)  1-2.
B)  4-6.
C)  6-8.
D)  8-10.
E)  13-14.F) B) and C)
G) A) and B)

Question 5

Saturation occurs when

Accepted Answer

A)  there is so much enzyme present that the reaction rate decreases if more is added.
B)  all enzymes are busy and further increases in substrate concentration will not increase reaction rate.
C)  enzymes become fatigued and can no longer catalyze changes in the substrate.
D)  intramolecular interactions are disrupted in the enzyme,decreasing its efficiency and decreasing reaction rate.
E)  the substrate is denatured and the enzyme cannot catalyze any changes in its structure.F) B) and D)
G) A) and B)

Question 6

When the body's digestive system breaks down starch,a complex carbohydrate,into simpler carbohydrates,the reaction is

Accepted Answer

A)  anabolic and endergonic.
B)  anabolic and exergonic.
C)  catabolic and exergonic.
D)  catabolic and endergonic.E) A) and B)
F) B) and D)

Question 7

In the regulation of enzymes,negative feedback ensures that a lot of product can be made from only a little bit of substrate.

Accepted Answer

A) True 
 B)False

Question 8

Three molecules that are important energy storage locations in the body are

Accepted Answer

A)  DNA,tRNA,and rRNA.
B)  glucose,glucagon,and glycogen.
C)  ATP,glycogen,and triglyceride.
D)  ADP,DNA,and mRNA.
E)  glucagon,insulin,and protein.F) B) and C)
G) C) and D)

Question 9

In performing its enzymatic function,carbonic anhydrase

Accepted Answer

A)  requires the inorganic coenzyme zinc.
B)  requires the organic coenzyme carbon dioxide.
C)  is facilitated by the inorganic coenzyme NAD+.
D)  is facilitated by the organic coenzyme zinc.
E)  requires the inorganic coenzyme NADPH.F) All of the above
G) A) and E)

Question 10

As a runner sprints down a track,her movement is an example of

Accepted Answer

A)  potential energy.
B)  mechanical energy.
C)  heat.
D)  radiant energy.
E)  chemical energy.F) None of the above
G) A) and B)

Question 11

Oxidative phosphorylation within the electron transport system accounts for a little less than half of the ATP synthesized from the breakdown of glucose.

Accepted Answer

A) True 
 B)False

Question 12

The net ATP available for a cell to use after glycolysis of one glucose molecule is _____.or

Accepted Answer

The answer of The net ATP available for a cell...

Question 13

Which is a form of energy that is generally unavailable to do any work

Accepted Answer

A)  Heat
B)  Kinetic energy
C)  Radiant energy
D)  Sound energy
E)  Mechanical energyF) A) and E)
G) B) and C)

Question 14

An isomerase bonds two similar molecules together to form a larger one.

Accepted Answer

A) True 
 B)False

Question 15

Briefly describe how enzymes are named.What is generally used for the root of the name,and what is generally used as the suffix
 Provide one example.

Accepted Answer

The root is usually the substr...

Question 16

A substance that binds to the active site of an enzyme and turns it off is called a _________ inhibitor.

Accepted Answer

The answer of A substance that binds to the active...

Question 17

The reaction in which water and carbon dioxide combine to form carbonic acid is

Accepted Answer

A)  irreversible,as carbonic acid rapidly causes a drop in pH.
B)  reversible,and can proceed in either direction depending on the concentrations of the molecules.
C)  exergonic,and is an important energy source within the body.
D)  an exchange reaction in which protons are transferred between atoms.
E)  a catabolic reaction in which the formation of a larger molecule can lead to an increase in cell size.F) B) and E)
G) D) and E)

Question 18

A reaction with a very high activation energy should have a very high reaction rate.

Accepted Answer

A) True 
 B)False

Question 19

Diseases of the respiratory or circulatory systems that impair oxygen delivery to body cells will diminish ATP production in those cells.

Accepted Answer

A) True 
 B)False

Question 20

Stored energy is described as potential energy.

Accepted Answer

A) True 
 B)False

Exam 3: Energy,Chemical Reactions,and Cellular Respiration

Briefly describe how enzymes are named.What is generally used for the root of the name,and what is generally used as the suffix Provide one example.

Correct AnswerverifiedThe root is usually the substr...View AnswerShow Answer

Stored energy is described as potential energy.

Correct AnswerverifiedShow Answer

A reaction with a very high activation energy should have a very high reaction rate.

Correct AnswerverifiedShow Answer

An isomerase bonds two similar molecules together to form a larger one.

Correct AnswerverifiedShow Answer

Three molecules that are important energy storage locations in the body are

Correct AnswerverifiedShow Answer

In a chemical reaction where an electron is exchanged from one reactant to another,the structure that loses an electron is

Correct AnswerverifiedShow Answer

Oxidative phosphorylation within the electron transport system accounts for a little less than half of the ATP synthesized from the breakdown of glucose.

Correct AnswerverifiedShow Answer

Lactase is an enzyme that digests lactose.

Correct AnswerverifiedShow Answer

The reaction in which water and carbon dioxide combine to form carbonic acid is

Correct AnswerverifiedShow Answer

In the regulation of enzymes,negative feedback ensures that a lot of product can be made from only a little bit of substrate.

Correct AnswerverifiedShow Answer

When the body's digestive system breaks down starch,a complex carbohydrate,into simpler carbohydrates,the reaction is

Correct AnswerverifiedShow Answer

Saturation occurs when

Correct AnswerverifiedShow Answer

A substance that binds to the active site of an enzyme and turns it off is called a _________ inhibitor.

Correct AnswerverifiedShow Answer

In performing its enzymatic function,carbonic anhydrase

Correct AnswerverifiedShow Answer

Which is a form of energy that is generally unavailable to do any work

Correct AnswerverifiedShow Answer

The optimal pH range for most human enzymes is

Correct AnswerverifiedShow Answer

Diseases of the respiratory or circulatory systems that impair oxygen delivery to body cells will diminish ATP production in those cells.

Correct AnswerverifiedShow Answer

The net ATP available for a cell to use after glycolysis of one glucose molecule is _____.or

Correct AnswerverifiedShow Answer

The presence of an enzyme within a chemical system

Correct AnswerverifiedShow Answer

As a runner sprints down a track,her movement is an example of

Correct AnswerverifiedShow Answer

Correct Answer
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The root is usually the substr...
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