Question 1

Energy flows into the biological world from the:

Accepted Answer

A)  oceans
B)  plants
C)  sun
D)  volcanoes
E)  large animalsF) A) and B)
G) B) and D)

Question 2

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

Accepted Answer

The answer of The site where a signal molecule binds...

Question 3

A measure of the degree of disorder in a system is called __________.

Accepted Answer

The answer of A measure of the degree of disorder...

Question 4

Explain the components of an ATP molecule.

Accepted Answer

An ATP molecule is composed of three sub...

Question 5

A ball sitting on a table top has __________ energy because of its position.

Accepted Answer

The answer of A ball sitting on a table top...

Question 6

The site on the enzyme surface where the reactant fits is referred to as the:

Accepted Answer

A)  reactive site
B)  allosteric site
C)  active site
D)  binding siteE) A) and C)
F) B) and C)

Question 7

ATP is composed of a sugar,the organic base adenine,and:

Accepted Answer

A)  three phosphate groups
B)  two phosphate groups
C)  three nitrate groups
D)  phenylalanineE) A) and B)
F) A) and C)

Question 8

The First Law of Thermodynamics states that ________________

Accepted Answer

Energy can be converted from one form to aher,but can be destroyed

Question 9

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 - 14F) A) and E)
G) B) and E) C

Question 10

The study of energy is called _____________.

Accepted Answer

The answer of The study of energy is called _____________....

Question 11

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.F) C) and D)
G) B) and D)

Question 12

Reactions that tend to go on their own,releasing energy,are called:

Accepted Answer

A)  endergonic
B)  exergonic
C)  catalytic
D)  productiveE) B) and C)
F) A) and B)

Question 13

Which is incorrect about enzymes?

Accepted Answer

A)  Many drugs,like statin drugs,work by inhibiting key enzymes in cells.
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.F) A) and B)
G) B) and E)

Question 14

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)  catalysisF) A) and B)
G) A) and C)

Question 15

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 energyF) A) and B)
G) B) and D)

Question 16

The making and breaking of chemical bonds is called:

Accepted Answer

A)  entropy reactions
B)  chemical reactions
C)  thermodynamic reactions
D)  catalysis reactions
E)  activation energy reactionsF) A) and B)
G) All of the above B

Question 17

Explain how enzymes are regulated by feedback inhibition.

Accepted Answer

Enzymes can be regulated by a mechanism ...

Question 18

A competitive inhibitor interferes with:

Accepted Answer

A)  the active site of the enzyme so a substrate cannot bind
B)  the repressor site of the enzyme so a substrate cannot bind
C)  the allosteric site of the enzyme so a substrate cannot bind
D)  the oxidized site of the enzyme so a substrate cannot bind
E)  the reduced site of the enzyme so a substrate cannot bindF) A) and B)
G) All of the above

Question 19

Objects that are not actively moving but have the capacity to do so are said to possess:

Accepted Answer

A)  kinetic energy
B)  potential energy
C)  entropy
D)  living energyE) C) and D)
F) A) and C)

Question 20

Enzymes are catalysts because they operate to:

Accepted Answer

A)  lower activation energy
B)  raise activation energy
C)  supply activation energy
D)  supply the reactantsE) A) and B)
F) C) and D)

Exam 5: Energy and Life

Energy flows into the biological world from the:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A measure of the degree of disorder in a system is called __________.

Correct AnswerverifiedShow Answer

Explain the components of an ATP molecule.

Correct AnswerverifiedAn ATP molecule is composed of three sub...View AnswerShow Answer

A ball sitting on a table top has __________ energy because of its position.

Correct AnswerverifiedShow Answer

The site on the enzyme surface where the reactant fits is referred to as the:

Correct AnswerverifiedShow Answer

ATP is composed of a sugar,the organic base adenine,and:

Correct AnswerverifiedShow Answer

The First Law of Thermodynamics states that ________________

Correct AnswerverifiedEnergy can be converted from one form to aher,but can be destroyed

Most human enzymes work best within the range of:

Correct AnswerverifiedC

The study of energy is called _____________.

Correct AnswerverifiedShow Answer

All of the following are correct about energy except:

Correct AnswerverifiedShow Answer

Reactions that tend to go on their own,releasing energy,are called:

Correct AnswerverifiedShow Answer

Which is incorrect about enzymes?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The making and breaking of chemical bonds is called:

Correct AnswerverifiedB

Explain how enzymes are regulated by feedback inhibition.

Correct AnswerverifiedEnzymes can be regulated by a mechanism ...View AnswerShow Answer

A competitive inhibitor interferes with:

Correct AnswerverifiedShow Answer

Objects that are not actively moving but have the capacity to do so are said to possess:

Correct AnswerverifiedShow Answer

Enzymes are catalysts because they operate to:

Correct AnswerverifiedShow Answer

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An ATP molecule is composed of three sub...
View Answer

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Energy can be converted from one form to aher,but can be destroyed

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C

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B

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Enzymes can be regulated by a mechanism ...
View Answer

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