Question 1

Ca++ or Mg++ are most likely to be part of ________,while Zn++ or Fe++ are present in ________.

Accepted Answer

A)  metal-activated enzymes;metalloenzymes
B)  metalloenzymes;metal-activated enzymes
C)  cofactors;coenzymes
D)  coenzymes;cofactors
E)  apoenzymes;holoenzymesF) B) and C)
G) C) and D)

Question 2

An internal aldimine forms when PLP is covalently bound to its enzyme.

Accepted Answer

A) True 
 B)False

Question 3

Which metabolic function depends on Coenzyme A?

Accepted Answer

A)  Oxidation of fuel molecules.
B)  Synthesis of DNA.
C)  Synthesis of guanine.
D)  Conversion of ATP to ADP.E) A) and B)
F) A) and C)

Question 4

Which atom is the reactive center on biotin?

Accepted Answer

A)  Arrow 1
B)  Arrow 2
C)  Arrow 3
D)  Arrow 4E) All of the above
F) B) and C)

Question 5

The reactive center of CoA is the -NH₃+ group.

Accepted Answer

A) True 
 B)False

Question 6

Another name for vitamin K is phylloquinone.

Accepted Answer

A) True 
 B)False

Question 7

Which statement is false about 5,6,7,8-tetrahydrobiopterin?

Accepted Answer

A)  It is required by the enzyme that catalyzes the synthesis of nitric oxide from arginine.
B)  It is synthesized by animals and other organisms.
C)  It is used in the transfer of phosphate groups during DNA synthesis.
D)  It is a reducing agent in the conversion of phenylalanine to tyrosine.E) B) and D)
F) A) and B)

Question 8

The structure shown below is which coenzyme? 12. C) Biotin. D) Thiamine pyrophosphate." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  QH₂.
B)  Vitamin B12.
C)  Biotin.
D)  Thiamine pyrophosphate.E) A) and B)
F) B) and C)

Question 9

Why has dihydrofolate reductase been identified as a potential target for chemotherapy in the treatment of cancer?

Accepted Answer

A)  It is a hormone that is a primary control agent of the rate of mitosis.
B)  It is a DNA binding protein that activates a cancer oncogene.
C)  It is essential in DNA synthesis.Cell division will not occur without it.
D)  It selectively binds to a receptor on the surface of cancer cells and inactivates them.E) A) and B)
F) C) and D)

Question 10

What is another name for vitamin B1?

Accepted Answer

A)  Biotin.
B)  Thiamine.
C)  Lipoamide.
D)  Pyridoxal phosphate.E) B) and C)
F) A) and B)

Question 11

What is another name for vitamin B12?

Accepted Answer

A)  Thiamine.
B)  Tetrahydrofolate.
C)  Cobalamin.
D)  Biotin.E) B) and C)
F) A) and D)

Question 12

Which are common protein coenzymes?

Accepted Answer

A)  Cytochromes.
B)  Phylloquinones.
C)  Tetrahydrofolates.
D)  α-tocopherols .E) B) and C)
F) A) and D)

Question 13

Match each of the following vitamins with an associate nutritional deficiency disease.
-Folate

Accepted Answer

A)  Pernicious anemia
B)  anemia
C)  Dermititis in humans
D)  scurvy
E)  beriberiF) B) and E)
G) B) and D)

Exam 7: Coenzymes and Vitamins

Which statement is false about 5,6,7,8-tetrahydrobiopterin?

Correct Answer
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What is another name for vitamin B1?

Correct Answer
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What is another name for vitamin B12?

Correct Answer
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Which metabolic function depends on Coenzyme A?

Correct Answer
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Why has dihydrofolate reductase been identified as a potential target for chemotherapy in the treatment of cancer?

Correct Answer
verified

The reactive center of CoA is the -NH₃+ group.

Correct Answer
verified

Which atom is the reactive center on biotin?

Correct Answer
verified

Ca++ or Mg++ are most likely to be part of ,while Zn++ or Fe++ are present in .

Correct Answer
verified

Another name for vitamin K is phylloquinone.

Correct Answer
verified

The structure shown below is which coenzyme?

Correct Answer
verified

An internal aldimine forms when PLP is covalently bound to its enzyme.

Correct Answer
verified

Which are common protein coenzymes?

Correct Answer
verified

Match each of the following vitamins with an associate nutritional deficiency disease. -Folate

Correct Answer
verified

Exam 7: Coenzymes and Vitamins

Which statement is false about 5,6,7,8-tetrahydrobiopterin?

Correct AnswerverifiedShow Answer

What is another name for vitamin B1?

Correct AnswerverifiedShow Answer

What is another name for vitamin B12?

Correct AnswerverifiedShow Answer

Which metabolic function depends on Coenzyme A?

Correct AnswerverifiedShow Answer

Why has dihydrofolate reductase been identified as a potential target for chemotherapy in the treatment of cancer?

Correct AnswerverifiedShow Answer

The reactive center of CoA is the -NH₃+ group.

Correct AnswerverifiedShow Answer

Which atom is the reactive center on biotin?

Correct AnswerverifiedShow Answer

Ca++ or Mg++ are most likely to be part of ________,while Zn++ or Fe++ are present in ________.

Correct AnswerverifiedShow Answer

Another name for vitamin K is phylloquinone.

Correct AnswerverifiedShow Answer

The structure shown below is which coenzyme?

Correct AnswerverifiedShow Answer

An internal aldimine forms when PLP is covalently bound to its enzyme.

Correct AnswerverifiedShow Answer

Which are common protein coenzymes?

Correct AnswerverifiedShow Answer

Match each of the following vitamins with an associate nutritional deficiency disease. -Folate

Correct AnswerverifiedShow Answer

Correct Answer
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Ca++ or Mg++ are most likely to be part of ,while Zn++ or Fe++ are present in .

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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