Question 1

Which labeled group is active in the redox function of the cofactor shown in Figure 5.1, and in which pathway is it most important?

Accepted Answer

A)  Label I; transaminations.
B)  Label II; tricarboxylic acid (TC
A)   cycle.
C)  Label III; glycolysis.
D)  Label IV; oxidative phosphorylation.
E)  Label V; folate cycling.F) A) and E)
G) None of the above D

Question 2

The cleavage of adenosine triphosphate (ATP)  to adenosine monophosphate (AMP)  + pyrophosphate is said to supply more energy than the cleavage of ATP to ADP + phosphate.Why?

Accepted Answer

A)  ATP → ADP + phosphate cleaves a phosphoanhydride bond, and ATP → AMP + pyrophosphate cleaves a phosphodiester bond.
B)  The cleavage to AMP and pyrophosphate is followed by the degradation of AMP by adenosine deaminase.
C)  The cleavage to AMP and pyrophosphate is followed by the degradation of pyrophosphate.
D)  ATP → ADP + phosphate cleaves a phosphoanhydride bond, and ATP → AMP + pyrophosphate cleaves a phosphate ester bond.
E)  ATP → ADP + phosphate cleaves a phosphate ester bond, and ATP → AMP + pyrophosphate cleaves a phosphoanhydride bond.F) All of the above
G) A) and D) C

Question 3

Coenzyme A has a very specific function in metabolic pathways.Its task is:

Accepted Answer

A)  Transfer of hydrogen.
B)  Transfer of electrons.
C)  Attachment of carboxyl groups.
D)  Activation of monosaccharides for the synthesis of complex carbohydrates.
E)  Activation of organic acids.F) B) and E)
G) A) and B)

Question 4

Flavoproteins are proteins that contain:

Accepted Answer

A)  Heme.
B)  FAD or flavin mononucleotide (FMN) .
C)  Nicotinamide adenine dinucleotide (NA
D)   or nicotinamide adenine dinucleotide phosphate (NADP) .
D)  Zinc or copper.
E)  Coenzyme A.F) None of the above
G) D) and E) B

Exam 5: Coenzymes

Which labeled group is active in the redox function of the cofactor shown in Figure 5.1, and in which pathway is it most important?

Correct Answer
verified
D

The cleavage of adenosine triphosphate (ATP) to adenosine monophosphate (AMP) + pyrophosphate is said to supply more energy than the cleavage of ATP to ADP + phosphate.Why?

Correct Answer
verified
C

Coenzyme A has a very specific function in metabolic pathways.Its task is:

Correct Answer
verified

Flavoproteins are proteins that contain:

Correct Answer
verified
B

Exam 5: Coenzymes

Which labeled group is active in the redox function of the cofactor shown in Figure 5.1, and in which pathway is it most important?

Correct AnswerverifiedD

The cleavage of adenosine triphosphate (ATP) to adenosine monophosphate (AMP) + pyrophosphate is said to supply more energy than the cleavage of ATP to ADP + phosphate.Why?

Correct AnswerverifiedC

Coenzyme A has a very specific function in metabolic pathways.Its task is:

Correct AnswerverifiedShow Answer

Flavoproteins are proteins that contain:

Correct AnswerverifiedB

Correct Answer
verified
D

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified
B