MCQOPTIONS

Explore topic-wise MCQs in Biochemistry.

This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.

1.	Transaminase enzymes are present in
A.	liver
B.	pancreas
C.	intestine
D.	none of these
Answer» B. pancreas

2.	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
Answer» C. acid to a keto acid plus ammonia

3.	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
Answer» B. glucogenic amino acid

4.	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
Answer» C. pyruvate or citric acid cycle intermediates

5.	A best described ketogenic amino acid is
A.	lysine
B.	tryptophan
C.	valine
D.	none of these
Answer» B. tryptophan

6.	A person with phenylketonuria will convert
A.	phenylalanine to phenylpyruvate
B.	phenylalanine to isoleucine
C.	phenylpyruvate to phenylalanine
D.	tyrosine to phenylalanine
Answer» B. phenylalanine to isoleucine

7.	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
Answer» C. tyrosine

8.	In the normal breakdown of phenylalanine, it is initially degraded to
A.	fumarate
B.	tyrosine
C.	lysine
D.	phenylpuruvate
Answer» C. lysine

9.	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
Answer» D. group from an amino acid to a carboxylic acid

10.	Transamination is the process where
A.	carboxyl group is transferred from amino acid
B.	-amino group is removed from the amino acid
C.	polymerisation of amino acid takes place
D.	none of the above
Answer» C. polymerisation of amino acid takes place

11.	The most toxic compounds is
A.	tyrosine
B.	phenylpyruvate
C.	lysine
D.	phenylalanine
Answer» C. lysine

12.	Histidine is degraded to -ketoglutarate and is described as a
A.	gluco amino acid
B.	glucogenic amino acid
C.	ketogenic amino acid
D.	keto-gluco amino acid
Answer» C. ketogenic amino acid

13.	Which of the following amino acids is considered as both ketogenic and glucogenic?
A.	Valine
B.	Tryptophan
C.	Lysine
D.	None of these
Answer» C. Lysine

14.	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
Answer» D. none of the above

15.	Which of the following is the best described glucogenic amino acid?
A.	Lysine
B.	Tryptophan
C.	Valine
D.	None of these
Answer» D. None of these

16.	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
Answer» D. keto-gluco amino acid

17.	A person with phenylketonuria cannot convert
A.	phenylalanine to tyrosine
B.	phenylalanine to isoleucine
C.	phenol into ketones
D.	phenylalanine to lysine
Answer» B. phenylalanine to isoleucine

18.	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
Answer» E.