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Amino Acid Metabolism MCQ Questions & Answers

Amino Acid Metabolism MCQs : This section focuses on the "Amino Acid Metabolism". These Multiple Choice Questions (MCQs) should be practiced to improve the Amino Acid Metabolism skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

A ketogenic amino acid is one which degrades to

A. keto-sugars
B. either acetyl CoA or acetoacetyl CoA
C. pyruvate or citric acid cycle intermediates
D. multiple intermediates including pyruvate or citric acid cycle intermediates and acetyl CoA or acetoacetyl CoA

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Question 2

Which of the following is non-essential amino acid?

A. Lysine
B. Leucine
C. Serine
D. Methionine

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Question 3

Which of the following amino acids is considered as both ketogenic and glucogenic?

A. Valine
B. Tryptophan
C. Lysine
D. None of these

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Question 4

The urea cycle is also referred to as Krebs-Henseleit cycle.

A. True
B. False

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Question 5

A glucogenic amino acid is one which is degraded to

A. keto-sugars
B. either acetyl CoA or acetoacetyl CoA
C. pyruvate or citric acid cycle intermediates
D. none of the above

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Question 6

A best described ketogenic amino acid is

A. lysine
B. tryptophan
C. valine
D. none of these

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Question 7

The most toxic compounds is

A. tyrosine
B. phenylpyruvate
C. lysine
D. phenylalanine

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Question 8

A person with phenylketonuria is advised not to consume which of the following products?

A. Glycine containing foods
B. Fat containing food
C. Glucose
D. Aspartame

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Question 9

Transamination is the process where

A. carboxyl group is transferred from amino acid
B. α-amino group is removed from the amino acid
C. polymerisation of amino acid takes place
D. none of the above

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Question 10

In which form the nitrogen is incorporated into an amino acid?

A. Nitrite
B. Glutamate
C. Nitrate
D. Ammonium ion

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Question 11

Which of these amino acids are essential for infants?

A. Methionine
B. Arginine and Histidine
C. Valine
D. Lysine and Leucine

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Question 12

Histidine is degraded to α-ketoglutarate and is described as a

A. gluco amino acid
B. glucogenic amino acid
C. ketogenic amino acid
D. keto-gluco amino acid

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Question 13

A person with phenylketonuria will convert

A. phenylalanine to phenylpyruvate
B. phenylalanine to isoleucine
C. phenylpyruvate to phenylalanine
D. tyrosine to phenylalanine

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Question 14

Transaminase enzymes are present in

A. liver
B. pancreas
C. intestine
D. none of these

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Question 15

Name those living organisms which secrete nitrogen in the form of urea?

A. Ureotelic
B. Uricotelic
C. Ammonotelic
D. Nitroso compounds

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Question 16

Which of these is a hereditary disease caused due to an error in amino acid metabolism?

A. Homocystinuria
B. Albinism
C. Phenylketonuria
D. Branched-chain ketoaciduria

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Question 17

An example of a transamination process is

A. glutamate = hexanoic acid + NH3
B. aspartate + hexanoic acid = glutamate + oxaloacetate
C. aspartate + α ketoglutarate = glutamate + oxaloacetate
D. glutamate = α-ketoglutarate + NH3

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Question 18

Tyrosine is degraded to acetoacetyl CoA and fumarate and is described as a

A. glucogenic amino acid
B. ketogenic amino acid
C. ketogenic and glucogenic amino acid
D. keto-gluco amino acid

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Question 19

A person with phenylketonuria cannot convert

A. phenylalanine to tyrosine
B. phenylalanine to isoleucine
C. phenol into ketones
D. phenylalanine to lysine

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Question 20

An example of the oxidative deamination is

A. glutamate = hexanoic acid + NH3
B. aspartate + α-ketoglutarate = glutamate + oxaloacetate
C. glutamate = α-ketoglutarate + NH3
D. aspartate + hexanoic acid = glutamate + Oxaloacetate

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Question 21

Name the type of cell in which synthesis of urea cycle takes place?

A. Pancreatic cell
B. Hepatocyte
C. Bowman’s gland cell
D. Urinary epithelium cell

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Question 22

Transamination reaction in amino acid synthesis is catalyzed by enzyme_________

A. Nitric oxide synthase
B. Decarboxylase
C. Aminotransferase
D. Glutamate decarboxylase

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Question 23

Lysine is degraded to acetoacetyl CoA and is described as a

A. ketogenic amino acid
B. glucogenic amino acid
C. keto-gluco amino acid
D. none of these

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Question 24

A person suffering from phenylketonuria on consumption food containing high phenylalanine may lead to the accumulation of

A. phenylalanine
B. phenylpyruvate
C. tyrosine
D. isoleucine

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Question 25

Transamination is the transfer of an amino

A. acid to a carboxylic acid plus ammonia
B. group from an amino acid to a keto acid
C. acid to a keto acid plus ammonia
D. group from an amino acid to a carboxylic acid

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Question 26

In the normal breakdown of phenylalanine, it is initially degraded to

A. fumarate
B. tyrosine
C. lysine
D. phenylpuruvate

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Question 27

Intermediates of which of the following metabolic pathway have not been used in the synthesis of amino acids?

A. Glycolysis
B. Fatty acid biosynthesis
C. Citric acid cycle
D. Pentose phosphate pathway

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Question 28

Oxidative deamination is the conversion of an amino

A. group from an amino acid to a keto acid
B. acid to a carboxylic acid plus ammonia
C. acid to a keto acid plus ammonia
D. group from an amino acid to a carboxylic acid

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Question 29

Which of the following is the best described glucogenic amino acid?

A. Lysine
B. Tryptophan
C. Valine
D. None of these

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