Download MBBS 1st Year 2022 MAY 526056 Biochemistry Paper II Multiple Choice Supplementary Cbme MCQs Question Paper

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THE TAMIL NADU DR. M.G.R. MEDICAL UNIVERSITY
[MBBS 0222] MAY 2022 Sub. Code :6056
M.B.B.S. DEGREE EXAMINATION
(For the candidates admitted from the Academic Year 2019-2020)
FIRST YEAR ? SUPPLEMENTARY (CBME)
PAPER II ? BIOCHEMISTRY
MULTIPLE CHOICE QUESTIONS
Q.P. Code: 526056
Time: 30 Minutes


Maximum : 20 Marks

Answer All Questions

Choose one correct answer in the box provided in the Answer Script. No overwriting
should be done.
III. Multiple Choice Questions:




(20 x 1 = 20)
1. Ketogenic amino acid is
A. Valine.
B. Cysteine.
C. Leucine.
D. Threonine.
2. Nitric oxide is synthesized from
A. Tyrosine.
B. Arginine.
C. Histidine.
D. Cysteine.
3. The cDNA is prepared by using the enzyme
A. RNA polymerase.
B. DNA polymerase.
C. Reverse transcriptase.
D. Restriction endonuclease.
4. Melatonin is synthesized from
A. Tyrosine.
B. Tryptophan.
C. Threonine.
D. Glycine.
5. Normal blood pH is
A. 6.8 - 7
B. 7 - 7.12
C. 7.35 - 7.45
D. 7.5 ? 7.9

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6. Which of the following is not a nucleoside?
A. Adenosine.
B. Cytosine.
C. Guanosine.
D. Xanthosine.
7. Burnt sugar urine odour is seen in
A. Phenylketonuria.
B. Multiple carboxylase deficiency.
C. Diabetic ketoacidosis.
D. Maple syrup urine disease.
8. Aminoacid carrier defect found in
A. Maple syrup urine disease.
B. Alkaptonuria.
C. Phenylketonuria.
D. Cystinuria.
9. Stop codons are following except
A. UGA.
B. UAA.
C. UAU.
D. UAG.
10. Aspartic acid is used for the synthesis of which compound ?
A. Porphyrin.
B. Sphingomyelin.
C. Pyrimidine.
D. Folic acid.
11. All are transport proteins of blood except
A. Albumin.
B. Transcortin.
C. Transferrin.
D. Ferritin
12. In which of the following molecule could you find an anti codon ?
A. rRNA.
B. tRNA.
C. mRNA.
D. SnRNA.
13. Which enzyme protects DNA from aging ?
A. DNA polymerase.
B. Topoisomerase.
C. Deoxyribonuclease.
D. Telomerase.

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14. Histone acetylation causes
A. Increased heterochromatin formation.
B. DNA replication.
C. Methylation of cytosine.
D. Increased euchromatin formation.
15. Most common cause of Homocystinuria is a defect in the enzyme
A. Cystathionine synthase.
B. Methionine adenosyltransferase.
C. Methyl transferase.
D. SAH Hydrolase.
16. If one aminoacid is coded by more than one triplet, then this is known as
A. Degeneracy.
B. Frame-shift mutation.
C. Specificity.
D. Universality.
17. Alpha fetoprotein level in serum is increased in
A. prostate cancer.
B. Hepatoma.
C. Cancer lung.
D. Choriocarcinoma.
18. In pheochromocytoma, true is the excessive urinary excretion of
A. Vanillylmandelic acid.
B. Polyamines.
C. Hippuric acid.
D. 5 ? Hydroxyindole acetic acid.
19. Which polymerase is involved in transcribing mRNA ?
A. RNA polymerase I
B. RNA polymerase II
C. RNA polymerase III
D. DNA polymerase I
20. Daily requirement of zinc for adult male is
A. 1 mg
B. 10 mg
C. 100 mg
D. 1000 mg
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[MBBS 0522]

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