Question 1

Which organelles are involved in a redox cycle?

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

Question 2

The subunits from which ATP is made are

Accepted Answer

A)  ADP and phosphate.
B)  FAD and NAD+.
C)  FAD and NADPH.
D)  ADP and FAD.
E)  ADP and NAD+.F) A) and E)
G) A) and C)

Question 3

Astrophysicists explain that eventually the sun will swell to become a red giant,engulf the earth,and "burn out" with all forms of energy dispersing in a final "heat death." Compared with conditions today,the entropy of the universe then will

Accepted Answer

A)  have increased greatly.
B)  have decreased greatly.
C)  remain the same because energy cannot be created or destroyed.
D)  remain the same because new energy will replace the energy destroyed.E) None of the above
F) B) and C)

Question 4

The metabolic pathway below involves how many possible chemical reactions? A → B → C → D → E

Accepted Answer

A)  five
B)  six
C)  one
D)  fourE) B) and C)
F) A) and D)

Question 5

You are interrupted while eating some yogurt and you store the remaining yogurt in the refrigerator.A day later you return and find the surface of the yogurt is no longer smooth but has broken into several liquified areas.You correctly guess that enzymes from your saliva,via the spoon,have continued digesting the yogurt in your absence.If you left the yogurt on the counter for another 24 hours,what would happen?

Accepted Answer

A)  The reaction will soon stop because the amount of saliva is small,and you would have to add more saliva to continue the degradation.
B)  The reaction will continue since the enzymes have plenty of substrate.Additionally,it would speed up since the enzymes are exposed to warmer temperatures.
C)  The reaction will continue until half is digested and then stop because the reaction between substrate and product will be balanced.
D)  The reaction will stop because you have altered the environment and denatured the enzyme.E) None of the above
F) A) and B)

Question 6

ATP is considered a high-energy compound because under cellular conditions,7.3 kcal per mole of energy is released when a bond is broken between

Accepted Answer

A)  the base adenine and the sugar ribose.
B)  the adenosine and the phosphate groups.
C)  the base adenine and the phosphate groups.
D)  the adenosine diphosphate and the third phosphate.
E)  All of the bonds release energy as ATP is completely broken down.F) C) and D)
G) A) and C)

Question 7

Which of these statements is NOT a consequence of the second law of thermodynamics?

Accepted Answer

A)  While the total amount of energy is unchanged,the energy lost as heat is no longer useful to the cell in doing work.
B)  Reactions that occur spontaneously are those that increase the amount of useful energy in a system.
C)  The amount of disorder in the universe is always increasing.
D)  To maintain organization of a cell,a continual input of energy is required.E) A) and C)
F) C) and D)

Question 8

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

Accepted Answer

A)  energy of the reactant
B)  energy of the product
C)  energy of activation
D)  substrate concentrationE) A) and D)
F) A) and C)

Question 9

In living cells of all types,the hydrolysis of ATP to ADP + P is the main supply of energy.ATP releases its energy in areas of the cell where some work is being carried out.In such cases,special enzymes (ATPases)are necessary for the hydrolysis of ATP.How does the universality of ATP and the diversity of enzyme systems relate to the unity and diversity of life through evolution?

Accepted Answer

Answers may vary.At a glance,life forms ...

Question 10

Endergonic reactions

Accepted Answer

A)  release energy.
B)  have a negative ΔG 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 11

Which of the following scenarios accurately represents 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)  All of these are consistent with the second law of thermodynamics.E) All of the above
F) A) and D)

Question 12

C  →\rightarrow→  D is coupled with the reaction ATP  →\rightarrow→  ADP.Based on this information the reaction  C→DC \rightarrow DC→D  is ________. A ? B ? C ? D ? E

Accepted Answer

A)  endergonic
B)  exergonic
C)  spontaneous
D)  It cannot be determined from the information given. E) A) and D)
F) B) and C)

Question 13

Lactose is milk sugar,and as infants,humans produce substantial amounts of the lactase enzyme to digest it.However,as we age,we soon lose some or even all of our lactase.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)  taking lactase enzyme tablets or avoiding all dairy products.F) A) and B)
G) A) and D)

Question 14

An enzyme is a protein that causes the rate of the reaction to slow down.

Accepted Answer

A) True 
 B)False

Exam 6: Metabolism: Energy and Enzymes

Endergonic reactions

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Which of these statements is NOT a consequence of the second law of thermodynamics?

Correct Answer
verified

The metabolic pathway below involves how many possible chemical reactions? A → B → C → D → E

Correct Answer
verified

ATP is considered a high-energy compound because under cellular conditions,7.3 kcal per mole of energy is released when a bond is broken between

Correct Answer
verified

Astrophysicists explain that eventually the sun will swell to become a red giant,engulf the earth,and "burn out" with all forms of energy dispersing in a final "heat death." Compared with conditions today,the entropy of the universe then will

Correct Answer
verified

Correct Answer
verified
Answers may vary.At a glance,life forms ...
View Answer

Which organelles are involved in a redox cycle?

Correct Answer
verified

An enzyme is a protein that causes the rate of the reaction to slow down.

Correct Answer
verified

C $\rightarrow$ D is coupled with the reaction ATP $\rightarrow$ ADP.Based on this information the reaction $C \rightarrow D$ is ________. A ? B ? C ? D ? E

Correct Answer
verified

Correct Answer
verified

Which of the following scenarios accurately represents the second law of thermodynamics?

Correct Answer
verified

The subunits from which ATP is made are

Correct Answer
verified

Exam 6: Metabolism: Energy and Enzymes

Endergonic reactions

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of these statements is NOT a consequence of the second law of thermodynamics?

Correct AnswerverifiedShow Answer

The metabolic pathway below involves how many possible chemical reactions? A → B → C → D → E

Correct AnswerverifiedShow Answer

ATP is considered a high-energy compound because under cellular conditions,7.3 kcal per mole of energy is released when a bond is broken between

Correct AnswerverifiedShow Answer

Astrophysicists explain that eventually the sun will swell to become a red giant,engulf the earth,and "burn out" with all forms of energy dispersing in a final "heat death." Compared with conditions today,the entropy of the universe then will

Correct AnswerverifiedShow Answer

Correct AnswerverifiedAnswers may vary.At a glance,life forms ...View AnswerShow Answer

Which organelles are involved in a redox cycle?

Correct AnswerverifiedShow Answer

An enzyme is a protein that causes the rate of the reaction to slow down.

Correct AnswerverifiedShow Answer

C →\rightarrow→ D is coupled with the reaction ATP →\rightarrow→ ADP.Based on this information the reaction C→DC \rightarrow DC→D is ________. A ? B ? C ? D ? E

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following scenarios accurately represents the second law of thermodynamics?

Correct AnswerverifiedShow Answer

The subunits from which ATP is made are

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Answers may vary.At a glance,life forms ...
View Answer

Correct Answer
verified

Correct Answer
verified

C $\rightarrow$ D is coupled with the reaction ATP $\rightarrow$ ADP.Based on this information the reaction $C \rightarrow D$ is ________. A ? B ? C ? D ? E

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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