Question 1

A coenzyme is

Accepted Answer

A)   an ionic cofactor that interacts with an enzyme to allow it to work.
B)   a protein cofactor that interacts with an enzyme to allow it to work.
C)   a nonprotein organic cofactor that interacts with an enzyme to allow it to work.
D)   an ionic cofactor that interacts with an enzyme to inhibit it.
E)   a protein cofactor that interacts with an enzyme to inhibit it.F) A) and E)
G) None of the above

Question 2

While we are sitting down to lunch we are consuming _______ energy which will then be converted into ______ energy as we work until dinner time.

Accepted Answer

A)   potential, kinetic
B)   kinetic, potential
C)   kinetic, free
D)   potential, storedE) B) and D)
F) None of the above

Question 3

ATP is considered to be

Accepted Answer

A)   an enzyme used widely in all kinds of cells.
B)   a coenzyme used to inhibit or activate different enzymes.
C)   a molecule that carries a great deal of chemical energy in a chemical bond.
D)   the precursor of a high-energy membrane-bounded protein.E) A) and D)
F) A) and C)

Question 4

While science is not yet able to describe the phenomenon of "thinking" in physical terms, we can be certain that it is a process involving the metabolism of brain cells. With positron emission tomography (PET scan)  it is possible to inject short-lived isotopes and image the regions of the brain that have the most active metabolism during various mental activities. For different mental functions, different regions and amounts of nerve cells become active. However,

Accepted Answer

A)   the cellular energy expended in "thinking" must be less than the chemical bond energy supplied in food to these brain cells.
B)   "thought" cannot be linked to cell processes because energy is not related to matter.
C)   since thoughts can occur over and over, the requirement for a continual input of energy to prevent entropy does not apply to this cell activity.
D)   "thinking" is beyond the scope of science to study.E) A) and B)
F) B) and C)

Question 5

Which of the following labels is incorrectly identified?

Accepted Answer

A)   A refers to the products.
B)   B refers to the substrate-enzyme complex.
C)   C refers to the reactants.
D)   D refers to the product.E) All of the above
F) A) and C)

Question 6

Lactose is milk sugar, and humans produce substantial lactase enzyme to digest it when we are infants. However, we soon lose some or even all of our lactase after childhood. In such cases, undigested lactose passes to the lower intestine where bacteria break it down into lactic acid and CO2, causing painful gas and bloating. This problem could be avoided by

Accepted Answer

A)   avoiding all dairy products containing lactose.
B)   taking lactase enzyme tablets when consuming lactose products.
C)   taking any enzyme tablets when consuming dairy products.
D)   consuming lactose in tablet form.
E)   Both taking lactase enzyme and avoiding all dairy products would be correct.F) D) and E)
G) A) and E)

Question 7

Which of the following is an example of potential energy?

Accepted Answer

A)   a snickers bar
B)   an apple growing on a tree
C)   a glass of milk
D)   all are examples of potential energyE) All of the above
F) A) and D)

Question 8

__________ represents the first reactant of this metabolic pathway and ________ represents the endproduct (s)  of the pathway?

Accepted Answer

A)   A; E
B)   B; E and F
C)   A; E and F
D)   A and B; D and EE) B) and D)
F) C) and D)

Question 9

The sum of the chemical reaction in a cell constitute

Accepted Answer

A)   coupling reactions.
B)   free energy.
C)   endergonic reactions only.
D)   exergonic reactions only.
E)   metabolism.F) B) and E)
G) All of the above

Question 10

Which of the following conditions is in defiance of the Second Law of Thermodynamics?

Accepted Answer

A)   As our body converts glucose into ATP some of the energy is given off in the form of heat.
B)   The temperature of your car's engine begins to increase as you drive to work.
C)   When we are cold our body shivers as a response to the decrease in body temperature.
D)   None of these are in defiance of the Second Law of Thermodynamics.E) A) and D)
F) None of the above

Question 11

Explain how, at a glance, it appears that life must violate the laws of thermodynamics. Provide a brief explanation on how life does NOT violate these rules.

Accepted Answer

The first law of thermodynamics is at wo...

Question 12

Which organelles contain functioning ATP synthetase complexes in their membranes?

Accepted Answer

A)   golgi complexes and lysosomes
B)   mitochondria and chloroplasts
C)   endoplasmic reticulum and vesicles
D)   vacuoles and vesicles
E)   mitochondria and endoplasmic reticulumF) All of the above
G) B) and C)

Question 13

Analyze the graph. Label the following.  
A. The energy of activation of the reaction with an enzyme.
B. The energy of activation of the reaction without an enzyme.
C. The energy of the reactants.
D. The energy of the products. 
A. The energy of activation of the reaction with an enzyme.
B. The energy of activation of the reaction without an enzyme.
C. The energy of the reactants.
D. The energy of the products.

Accepted Answer

The answer of Analyze the graph. Label the following. ...

Question 14

Study the figure shown here. What does the letter A depict?

Accepted Answer

A)   energy of the reactant
B)   energy of the products
C)   energy of activation
D)   substrate concentrationE) All of the above
F) C) and D)

Question 15

Which of the following is consistent with the laws of thermodynamics governing energy?

Accepted Answer

A)   When a liter of gasoline is burned in a car engine, 100% of its energy goes into moving the car along the road.
B)   You eat a "quarter-pounder" hamburger and assemble exactly a quarter-pound of additional body weight on your body.
C)   Eventually sunlight that is absorbed on the earth returns to space as dispersed heat.
D)   A calorie of sunlight becomes a calorie of plant tissue that, eaten by you, becomes a calorie of heat lost in muscle "power."
E)   Chemical bonds are a case of converting energy to matter; breaking the bonds converts matter to energy.F) D) and E)
G) B) and D)

Question 16

During the conversion of glucose into a free form of energy only a small percentage is converted into useable ATP. What is the rest of the energy converted into?

Accepted Answer

A)   heat
B)   CO2
C)   H2O
D)   CO-E) A) and B)
F) C) and D)

Question 17

Endergonic reactions

Accepted Answer

A)   release energy.
B)   have a negative  Δ\DeltaΔ G and occur spontaneously.
C)   can only occur if there is an input of energy.
D)   have products with less free energy than the reactants.
E)   All of the choices are correct. F) A) and B)
G) A) and C)

Question 18

Which statement is NOT true about enzyme inhibition?

Accepted Answer

A)   In competitive inhibition, the inhibitor binds to the active site of the enzyme.
B)   In noncompetitive inhibition, the inhibitor binds to the allosteric site of the substrate.
C)   In irreversible inhibition, a poison binds to the enzyme so that it can never work again.
D)   Most inhibitors act in a reversible fashion.
E)   All of the statements are true.F) A) and E)
G) B) and C)

Question 19

A living organism represents stored energy in the form of chemical compounds. When an organism dies, what happens to this stored energy?

Accepted Answer

A)   All chemicals immediately lose their high-energy bonds.
B)   All molecules immediately degrade into basic elements.
C)   All energy immediately leaves, and that is one manifestation that the organism is dead.
D)   The chemical compounds in cells lose their organization over time because there is no longer an input of energy to maintain the organized state.
E)   The chemical compounds remain exactly intact and ready to start up again unless digested by a consumer or decay organism.F) D) and E)
G) B) and D)

Question 20

Which best describes the first law of thermodynamics?

Accepted Answer

A)   Energy is changed from one form to another with a loss of usable energy.
B)   Energy is not created nor destroyed, but it can change from one energy form to another.
C)   Energy can be created from matter or used to produce matter.
D)   Some useful energy is lost as heat whenever an energy transfer occurs.
E)   Energy transfers are always 100% efficient in changing energy from one useful form to another.F) D) and E)
G) A) and D)

Exam 6: Metabolism: Energy and Enzymes

During the conversion of glucose into a free form of energy only a small percentage is converted into useable ATP. What is the rest of the energy converted into?

Correct Answer
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ATP is considered to be

Correct Answer
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Correct Answer
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Endergonic reactions

Correct Answer
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Correct Answer
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Which best describes the first law of thermodynamics?

Correct Answer
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Which of the following conditions is in defiance of the Second Law of Thermodynamics?

Correct Answer
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Study the figure shown here. What does the letter A depict?

Correct Answer
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Which of the following is an example of potential energy?

Correct Answer
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Explain how, at a glance, it appears that life must violate the laws of thermodynamics. Provide a brief explanation on how life does NOT violate these rules.

Correct Answer
verified
The first law of thermodynamics is at wo...
View Answer

Which of the following is consistent with the laws of thermodynamics governing energy?

Correct Answer
verified

Which statement is NOT true about enzyme inhibition?

Correct Answer
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Which organelles contain functioning ATP synthetase complexes in their membranes?

Correct Answer
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Which of the following labels is incorrectly identified?

Correct Answer
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Correct Answer
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While we are sitting down to lunch we are consuming _ energy which will then be converted into energy as we work until dinner time.

Correct Answer
verified

The sum of the chemical reaction in a cell constitute

Correct Answer
verified

__ represents the first reactant of this metabolic pathway and represents the endproduct (s) of the pathway?

Correct Answer
verified

A coenzyme is

Correct Answer
verified

A living organism represents stored energy in the form of chemical compounds. When an organism dies, what happens to this stored energy?

Correct Answer
verified

Exam 6: Metabolism: Energy and Enzymes

During the conversion of glucose into a free form of energy only a small percentage is converted into useable ATP. What is the rest of the energy converted into?

Correct AnswerverifiedShow Answer

ATP is considered to be

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Endergonic reactions

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which best describes the first law of thermodynamics?

Correct AnswerverifiedShow Answer

Which of the following conditions is in defiance of the Second Law of Thermodynamics?

Correct AnswerverifiedShow Answer

Study the figure shown here. What does the letter A depict?

Correct AnswerverifiedShow Answer

Which of the following is an example of potential energy?

Correct AnswerverifiedShow Answer

Explain how, at a glance, it appears that life must violate the laws of thermodynamics. Provide a brief explanation on how life does NOT violate these rules.

Correct AnswerverifiedThe first law of thermodynamics is at wo...View AnswerShow Answer

Which of the following is consistent with the laws of thermodynamics governing energy?

Correct AnswerverifiedShow Answer

Which statement is NOT true about enzyme inhibition?

Correct AnswerverifiedShow Answer

Which organelles contain functioning ATP synthetase complexes in their membranes?

Correct AnswerverifiedShow Answer

Which of the following labels is incorrectly identified?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

While we are sitting down to lunch we are consuming _______ energy which will then be converted into ______ energy as we work until dinner time.

Correct AnswerverifiedShow Answer

The sum of the chemical reaction in a cell constitute

Correct AnswerverifiedShow Answer

__________ represents the first reactant of this metabolic pathway and ________ represents the endproduct (s) of the pathway?

Correct AnswerverifiedShow Answer

A coenzyme is

Correct AnswerverifiedShow Answer

A living organism represents stored energy in the form of chemical compounds. When an organism dies, what happens to this stored energy?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The first law of thermodynamics is at wo...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

While we are sitting down to lunch we are consuming _ energy which will then be converted into energy as we work until dinner time.

Correct Answer
verified

Correct Answer
verified

__ represents the first reactant of this metabolic pathway and represents the endproduct (s) of the pathway?

Correct Answer
verified

Correct Answer
verified

Correct Answer
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