Question 1

Explain how enzymes are regulated by feedback inhibition.

Accepted Answer

The answer of Explain how enzymes are regulated by feedback...

Question 2

The process of lowering the activation energy of a reaction is

Accepted Answer

A)   respiration.
B)   catalysis.
C)   oxidation.
D)   photosynthesis.

Question 3

Which of the following processes does NOT use ATP?

Accepted Answer

A)   Muscle contraction
B)   Active transport
C)   Heat production
D)   Diffusion of oxygen into the blood
E)   Cytoplasmic transport

Question 4

State the components of an ATP molecule.

Accepted Answer

An ATP (adenosine triphosphate) molecule...

Question 5

The second law of thermodynamics states that _________________.

Accepted Answer

disorder in a closed...

Question 6

Reactions that tend to occur spontaneously,releasing energy,are called

Accepted Answer

A)   endergonic.
B)   exergonic.
C)   catalytic.
D)   productive.

Question 7

During the ATP cycle,ATP is assembled from three phosphates,ribose,and adenine.

Accepted Answer

A) True 
 B)False  False

Question 8

The extra energy required to destabilize existing chemical bonds and to initiate a chemical reaction is called

Accepted Answer

A)   exergonic energy.
B)   endergonic energy.
C)   kinetic energy.
D)   activation energy.
E)   catalytic energy.

Question 9

What happens to enzymes when the temperature increases beyond their optimal reaction requirement?

Accepted Answer

The answer of What happens to enzymes when the temperature...

Question 10

The site where a noncompetitive inhibitor molecule binds to the surface of an enzyme is the ______________ site.

Accepted Answer

The answer of The site where a noncompetitive inhibitor molecule...

Question 11

Most human enzymes work best within the range of

Accepted Answer

A)   pH 3 - 5.
B)   pH 4 - 6.
C)   pH 6 - 8.
D)   pH 8 - 10.
E)   pH 11 - 14.

Question 12

All cells convert the potential energy found in food molecules into ATP through

Accepted Answer

A)   cellular respiration.
B)   photosynthesis.
C)   feedback inhibition.
D)   entropy.
E)   catalysis. A

Question 13

Enzymes are catalysts because they operate to

Accepted Answer

A)   lower activation energy.
B)   raise activation energy.
C)   supply activation energy.
D)   supply the reactants.

Question 14

All of the following are correct about energy except

Accepted Answer

A)   The biological world gets its energy from the sun.
B)   Chemical bonds store potential energy.
C)   All forms of energy can be converted to heat.
D)   Energy is defined as the ability to do work.
E)   A boulder perched on a hill has kinetic energy.

Question 15

An enzyme changes shape when catalyzing a chemical reaction,leading to a(n) _____ fit.

Accepted Answer

A)   perfect
B)   induced
C)   partial
D)   tight

Question 16

Distinguish between reactants,substrates,and products.

Accepted Answer

The answer of Distinguish between reactants,substrates,and products....

Question 17

Which is incorrect about enzymes?

Accepted Answer

A)   Enzyme repressors disrupt enzyme active site shape.
B)   A noncompetitive inhibitor of enzymes interferes with the active site of the enzyme.
C)   Enzymes need to have a precise shape to work correctly.
D)   In humans,extremely high fevers can be fatal because enzymes begin to unfold and stop working.
E)   Some enzymes can work in extreme temperatures or very low pH.

Question 18

Describe the ATP-ADP cycle.

Accepted Answer

The ATP-ADP cycle, also known as the ade...

Question 19

Energy flows into the biological world from the

Accepted Answer

A)   oceans.
B)   plants.
C)   sun.
D)   volcanoes.
E)   large animals. C

Question 20

The process of lowering the activation energy of a chemical reaction is called ________.

Accepted Answer

The answer of The process of lowering the activation energy...

Exam 5: Energy and Life

Explain how enzymes are regulated by feedback inhibition.

Correct AnswerverifiedShow Answer

The process of lowering the activation energy of a reaction is

Correct AnswerverifiedShow Answer

Which of the following processes does NOT use ATP?

Correct AnswerverifiedShow Answer

State the components of an ATP molecule.

Correct AnswerAnswered by ExamLex AIAn ATP (adenosine triphosphate) molecule...View AnswerShow Answer

The second law of thermodynamics states that _________________.

Correct Answerverifieddisorder in a closed...View AnswerShow Answer

Reactions that tend to occur spontaneously,releasing energy,are called

Correct AnswerverifiedShow Answer

During the ATP cycle,ATP is assembled from three phosphates,ribose,and adenine.

Correct AnswerverifiedFalse

The extra energy required to destabilize existing chemical bonds and to initiate a chemical reaction is called

Correct AnswerverifiedShow Answer

What happens to enzymes when the temperature increases beyond their optimal reaction requirement?

Correct AnswerverifiedShow Answer

The site where a noncompetitive inhibitor molecule binds to the surface of an enzyme is the ______________ site.

Correct AnswerverifiedShow Answer

Most human enzymes work best within the range of

Correct AnswerverifiedShow Answer

All cells convert the potential energy found in food molecules into ATP through

Correct AnswerverifiedA

Enzymes are catalysts because they operate to

Correct AnswerverifiedShow Answer

All of the following are correct about energy except

Correct AnswerverifiedShow Answer

An enzyme changes shape when catalyzing a chemical reaction,leading to a(n) _____ fit.

Correct AnswerverifiedShow Answer

Distinguish between reactants,substrates,and products.

Correct AnswerverifiedShow Answer

Which is incorrect about enzymes?

Correct AnswerverifiedShow Answer

Describe the ATP-ADP cycle.

Correct AnswerAnswered by ExamLex AIThe ATP-ADP cycle, also known as the ade...View AnswerShow Answer

Energy flows into the biological world from the

Correct AnswerverifiedC

The process of lowering the activation energy of a chemical reaction is called ________.

Correct AnswerverifiedShow Answer

Correct Answer
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Answered by ExamLex AI
An ATP (adenosine triphosphate) molecule...
View Answer

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disorder in a closed...
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False

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A

Correct Answer
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Correct Answer
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Correct Answer
Answered by ExamLex AI
The ATP-ADP cycle, also known as the ade...
View Answer

Correct Answer
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C

Correct Answer
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