Download MBBS 1st Year 2022 Feb 526056 Biochemistry Paper II Multiple Choice MCQs Question Paper

Download MBBS 1st Year (First Year) 2022 Feb 526056 Biochemistry Paper II Multiple Choice MCQs Previous Question Paper || MGR University | MBBS Latest 2024 Previous Year Question MCQs Papers

THE TAMIL NADU DR. M.G.R. MEDICAL UNIVERSITY
[MBBS 0222]
FEBRUARY 2022 Sub.Code : 6056
M.B.B.S. DEGREE EXAMINATION
(For the candidates admitted from the Academic Year 2019-2020)
FIRST YEAR
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. Normal blood calcium level is
A. 5 ? 7 mg/dl
B. 7 ? 9 mg/dl
C. 9 ? 11 mg /dl
D. 11 ? 13 mg /dl
2. Which is attached to 3' ( prime ) end of mRNA after transcription
A. Poly A tail.
B. CCA sequence.
C. 7 ? Methylguanosine.
D. Intron.
3. Among the following the most sensitive indicator of glomerular function is
A. Serum urea.
B. Serum creatinine.
C. Urea clearance.
D. Creatinine clearance.
4. Albinism is due to deficiency of which enzyme
A. Tyrosinase.
B. Tyrosine hydroxylase.
C. Phenylalanine hydroxylase.
D. Homogentisate oxidase.
5. Which enzyme deficiency causes LESCH NYHAN SYNDROME
A. Transcarboxylase.
B. HGPRTase.
C. Glutaminase.
D. PRPP synthetase.
6. Which is Nucleotide
A. Nitrogenous base + Sugar.
B. Nitrogenous base + Phosphate.
C. Nucleoside + Phosphate.
D. Nucleoside + sugar.

---

7. The aminoacid from which niacin is synthesized is
A. Tryptophan.
B. Tyrosine.
C. Threonine.
D. Histidine.
8. Phenyl butyrate is used in urea cycle disorders because it ?
A. Activates enzymes.
B. Maintains renal output.
C. Maintains energy level.
D. Increases renal excretion of Ammonia.
9. Which of the following proteins are abundant in the exracellular matrix?
A. Actin.
B. Myosin.
C. Tubulin.
D. Collagen.
10. Glycine is used for synthesis of all the following compounds except
A. Heme.
B. Creatinine.
C. Purine ring.
D. Pyrimidine ring.
11. Keshan's disease is due to deficiency of
A. Chromium.
B. Selenium.
C. Magnesium.
D. Copper.
12. In acute pancreatitis, the activity of the following enzyme in plasma is specifically
elevated
A. Alanine aminotransferase.
B. Aspartate aminotransferase.
C. Amylase.
D. Creatine kinase.
13. Which of the following is not a nutritionally essential aminoacids for humans ?
A. Leucine.
B. Tryptophan.
C. Tyrosine.
D. Methionine.
14. Which of the following is a structural component of RNA but not of DNA ?
A. Adenine.
B. Uracil.
C. Guanine.
D. Thymine.

---

15. Ehler-Danlos syndrome characterized by hypermobile joints and skin abnormalities is
due to
A. Abnormality in gene for procollagen.
B. Defect of elastase.
C. Deficiency of prolyl hydroxylase.
D. Deficiency of lysyl hydroxylase.
16. GABA ( Gamma amino butyric acid ) is
A. Post synaptic excitatory transmitter.
B. Post synaptic inhibitory transmitter.
C. Activator of glia cell formation.
D. Inhibitor of glia cell formation.
17. Which of the following is initiator codon for Translation ?
A. UAA.
B. UAG.
C. AUG.
D. UGA.
18. Casein, the milk protein is
A. Nucleoprotein.
B. Chromoprotein.
C. Phosphoprotein.
D. Glycoprotein.
19. Which of the following is the inhibitor of Thymidilate synthase enzyme ?
A. Methotrexate.
B. Allopurinol.
C. 5 ? Fluorouracil.
D. Hydroxy urea.
20. At isoelectric pH, the proteins show
A. Maximum net charge.
B. Maximum mobility in electric field.
C. Maximum precipitability.
D. Minimum buffering action.
*****

---