Question 1

The first law of thermodynamics states that

Accepted Answer

A)   energy is not created nor destroyed, but it can change into matter.
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)   energy transfers are always 100% efficient in changing energy from one useful form to another.E) C) and D)
F) B) and D)

Question 2

Cellular ____________ refers to the collective total of chemical processes that occur within living cells.

Accepted Answer

A)   energy
B)   thermodynamics
C)   potential
D)   metabolismE) A) and C)
F) C) and D)

Question 3

Which is true of enzyme-catalyzed reactions?

Accepted Answer

A)   All enzymes promote only catabolic reactions
B)   Reactions catalyzed by most enzymes tend to go predominantly in one direction
C)   All enzymatic reactions are reversible and produce equal amounts of products in both directions
D)   All enzymes promote only anabolic reactionsE) A) and D)
F) None of the above B

Question 4

If anaerobic glycolysis is only one-eighteenth as efficient as complete oxidation of glucose to carbon dioxide,then why would an organism use such an inefficient pathway?

Accepted Answer

There are several reasons why an organis...

Question 5

How specific are enzymes?

Accepted Answer

A)   Many enzymes can "cross over" to catalyze reactions of different substrates in the same chemical family
B)   There are 20 amino acids and therefore 20 enzymes that control all protein metabolic reactions
C)   An enzyme catalyzes one reaction but it may produce one product one time, another product another time
D)   An enzyme catalyzes one reaction and it produces a distinct productE) B) and D)
F) A) and D)

Question 6

The first process in breaking down glucose is

Accepted Answer

A)   the Krebs cycle.
B)   glycolysis.
C)   the electron transport system.
D)   fermentation.E) A) and D)
F) A) and B)

Question 7

Outline a hypothetical scenario of the evolution of metabolism.

Accepted Answer

Hypothetically, the evolution of metabol...

Question 8

Which organelle contains ATP synthetase complexes in its membrane?

Accepted Answer

A)   Golgi complexes
B)   Mitochondria
C)   Vesicles
D)   Endoplasmic reticulumE) A) and D)
F) C) and D)

Question 9

Which process produces alcohol or lactate?

Accepted Answer

A)   The Krebs cycle
B)   Glycolysis
C)   The electron transport system
D)   Fermentation
E)   Oxidative phosphorylationF) A) and B)
G) D) and E)

Question 10

For some enzymes to function,small nonprotein groups called ________ must participate along with the enzyme molecule.

Accepted Answer

The answer of For some enzymes to function,small nonprotein groups...

Question 11

What establishes an electrochemical gradient across a membrane to provide energy for ATP production?

Accepted Answer

A)   The mitochondrion's electron transport system provides the ions
B)   Hydrogen ions naturally collect on the outside of the organelle membrane
C)   Hydrogen ions are pumped across the membrane by carrier proteins
D)   All of the above establish the electrochemical gradientE) A) and D)
F) B) and C)

Question 12

How do an enzyme and its substrate fit together?

Accepted Answer

A)   The enzyme breaks down as product is released
B)   The whole enzyme is a key that fits into the substrate that is a lock forming a new molecule product
C)   Any active site is permanently changed when it interacts with the substrate
D)   As the substrate binds to the enzyme, the shape of the active site changes to accommodate the reactionE) B) and C)
F) B) and D)

Question 13

Discuss the recent research that claims that food intake,and therefore the amount of fat deposition,is creating a "set point" in specific parts of the brain.

Accepted Answer

Recent research has suggested that food ...

Question 14

Full oxidative breakdown of glucose results in a net of ______ ATP molecules.

Accepted Answer

A)   2
B)   4
C)   16
D)   36E) A) and D)
F) B) and D)

Question 15

Both NADH and FADH2 are produced by

Accepted Answer

A)   the Krebs cycle.
B)   glycolysis.
C)   the electron transport system.
D)   oxidative phosphorylation.E) A) and B)
F) A) and C)

Question 16

Stored energy that is not doing work but has the capacity to do work is called __________ ___________.

Accepted Answer

potential energy

Question 17

In high levels,alcohol is toxic.Why would an animal utilize fermentation if it were wasteful of the energy in food molecules and posed the threat of killing itself?

Accepted Answer

A)   The organism can survive short spells of anaerobic conditions and maintain growth and reproduction
B)   If glucose levels are not high, there may be time to disperse the alcohol "waste."
C)   Fermentation can provide a rapid burst of ATP since it does not have to go through the full breakdown cycle
D)   All of the choices are advantagesE) A) and B)
F) None of the above

Question 18

Which pairs of processes are anaerobic?

Accepted Answer

A)   Glycolysis and the electron transport system
B)   Fermentation and the Krebs cycle
C)   Glycolysis and the Krebs cycle
D)   Fermentation and glycolysisE) B) and D)
F) C) and D)

Question 19

Can virtually any organic compound be broken down (assuming it is non-toxic)?

Accepted Answer

Virtually any organic compound can indee...

Question 20

If there are ten different intermediate products produced in stages leading to a molecule in a cell,we can expect that there

Accepted Answer

A)   is one enzyme that carries this process through each of the ten stages to the end product.
B)   is one enzyme for degradation and another enzyme for synthesis.
C)   may not be any enzymes involved if this is a natural cell product.
D)   are about ten enzymes, at least one responsible for each step in the metabolic pathway.E) None of the above
F) C) and D) D

Exam 4: Cellular Metabolism

The first law of thermodynamics states that

Correct AnswerverifiedShow Answer

Cellular ____________ refers to the collective total of chemical processes that occur within living cells.

Correct AnswerverifiedShow Answer

Which is true of enzyme-catalyzed reactions?

Correct AnswerverifiedB

If anaerobic glycolysis is only one-eighteenth as efficient as complete oxidation of glucose to carbon dioxide,then why would an organism use such an inefficient pathway?

Correct AnswerAnswered by ExamLex AIThere are several reasons why an organis...View AnswerShow Answer

How specific are enzymes?

Correct AnswerverifiedShow Answer

The first process in breaking down glucose is

Correct AnswerverifiedShow Answer

Outline a hypothetical scenario of the evolution of metabolism.

Correct AnswerAnswered by ExamLex AIHypothetically, the evolution of metabol...View AnswerShow Answer

Which organelle contains ATP synthetase complexes in its membrane?

Correct AnswerverifiedShow Answer

Which process produces alcohol or lactate?

Correct AnswerverifiedShow Answer

For some enzymes to function,small nonprotein groups called ________ must participate along with the enzyme molecule.

Correct AnswerverifiedShow Answer

What establishes an electrochemical gradient across a membrane to provide energy for ATP production?

Correct AnswerverifiedShow Answer

How do an enzyme and its substrate fit together?

Correct AnswerverifiedShow Answer

Discuss the recent research that claims that food intake,and therefore the amount of fat deposition,is creating a "set point" in specific parts of the brain.

Correct AnswerAnswered by ExamLex AIRecent research has suggested that food ...View AnswerShow Answer

Full oxidative breakdown of glucose results in a net of ______ ATP molecules.

Correct AnswerverifiedShow Answer

Both NADH and FADH2 are produced by

Correct AnswerverifiedShow Answer

Stored energy that is not doing work but has the capacity to do work is called __________ ___________.

Correct Answerverifiedpotential energy

In high levels,alcohol is toxic.Why would an animal utilize fermentation if it were wasteful of the energy in food molecules and posed the threat of killing itself?

Correct AnswerverifiedShow Answer

Which pairs of processes are anaerobic?

Correct AnswerverifiedShow Answer

Can virtually any organic compound be broken down (assuming it is non-toxic)?

Correct AnswerAnswered by ExamLex AIVirtually any organic compound can indee...View AnswerShow Answer

If there are ten different intermediate products produced in stages leading to a molecule in a cell,we can expect that there

Correct AnswerverifiedD

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Answered by ExamLex AI
There are several reasons why an organis...
View Answer

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Answered by ExamLex AI
Hypothetically, the evolution of metabol...
View Answer

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Correct Answer
Answered by ExamLex AI
Recent research has suggested that food ...
View Answer

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Both NADH and FADH₂ are produced by

Correct Answer
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Stored energy that is not doing work but has the capacity to do work is called _.

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potential energy

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Correct Answer
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Correct Answer
Answered by ExamLex AI
Virtually any organic compound can indee...
View Answer

Correct Answer
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