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
Question 2
Which of the following is non-essential amino acid?
A. Lysine
B. Leucine
C. Serine
D. Methionine
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
Question 4
The urea cycle is also referred to as Krebs-Henseleit cycle.
A. True
B. False
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
Question 6
A best described ketogenic amino acid is
A. lysine
B. tryptophan
C. valine
D. none of these
Question 7
The most toxic compounds is
A. tyrosine
B. phenylpyruvate
C. lysine
D. phenylalanine
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
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
Question 10
In which form the nitrogen is incorporated into an amino acid?
A. Nitrite
B. Glutamate
C. Nitrate
D. Ammonium ion
Question 11
Which of these amino acids are essential for infants?
A. Methionine
B. Arginine and Histidine
C. Valine
D. Lysine and Leucine
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
Question 13
A person with phenylketonuria will convert
A. phenylalanine to phenylpyruvate
B. phenylalanine to isoleucine
C. phenylpyruvate to phenylalanine
D. tyrosine to phenylalanine
Question 14
Transaminase enzymes are present in
A. liver
B. pancreas
C. intestine
D. none of these
Question 15
Name those living organisms which secrete nitrogen in the form of urea?
A. Ureotelic
B. Uricotelic
C. Ammonotelic
D. Nitroso compounds
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
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
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
Question 19
A person with phenylketonuria cannot convert
A. phenylalanine to tyrosine
B. phenylalanine to isoleucine
C. phenol into ketones
D. phenylalanine to lysine
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
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
Question 22
Transamination reaction in amino acid synthesis is catalyzed by enzyme_________
A. Nitric oxide synthase
B. Decarboxylase
C. Aminotransferase
D. Glutamate decarboxylase
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
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
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
Question 26
In the normal breakdown of phenylalanine, it is initially degraded to
A. fumarate
B. tyrosine
C. lysine
D. phenylpuruvate
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
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
Question 29
Which of the following is the best described glucogenic amino acid?
A. Lysine
B. Tryptophan
C. Valine
D. None of these