Proteins LM6: Transamination and Deamination Reactions

Proteins LM6: Transamination and Deamination Reactions

University

8 Qs

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Proteins LM6: Transamination and Deamination Reactions

Proteins LM6: Transamination and Deamination Reactions

Assessment

Quiz

Chemistry

University

Hard

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8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Most ammonia generated in the body normally comes from the oxidative deamination of which amino acid?

Ala

Glu

Asn

Asp

Gln

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which one of the following coenzymes carries one-carbon fragments from amino acids to intermediates of purine and pyrimidine nucleotides?

Glutamine

a-Ketoglutarate

Tetrahydrofolate

Aspartate

Vitamin B12

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which one of the following enzymes is involved with the conversion of aspartate and a-ketoglutarate to oxaloacetate and glutamate, respectively?

ALT

GLDH

SGPT

SGOT

Asparagine synthetase

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Glutamate dehydrogenase is present in all of the following, EXCEPT:

Erythrocytes

Liver

Kidney

Brain

Muscle

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

There are no known metabolic defects associated with the conversion of a-KG= to Glu, Ala to pyruvate, Asp to OAA, or Gln to Glu. This indicates that:

a. These reactions are unimportant.

b. These reactions are essential for life

.

c. Investigators have been largely funded to do

other studies.

d. Investigators have withheld information from

us.

e. Amino acid catabolism is unessential for life.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Essentially all of the a-amino nitrogen from amino acid catabolism can be funneled through:

Acetyl-CoA

a-Keto acids

Catalase

Asparagine

Glutamate

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The oxidative deamination of glutamate yields NH4+ and:

NAD+

Oxaloacetate

Gln

Pyruvate

a-KG=

8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The primary end-product of nitrogen metabolism in mammals is:

NH3

NH4+

Urea

NADH

Uric acid