Download NTRUHS 1st Year MBBS mcqs Biochemistry Paper II MCQs Question Paper

Q.P. CODE: M102A031

Dr NTR UNIVERSITY OF HEALTH SCIENCES: VIJAYAWADA- 520008

MBBS DEGREE EXAMINATION - AUGUST, 2024

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FIRST M.B.B.S. EXAMINATION

BIOCHEMISTRY - PAPER-II (SET-B)

(Multiple Choice Questions)

Time: 20 Minutes

Max Marks: 20

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Note: Answer all questions.

SECTION-I (MCQs - 20 MARKS)

1X2=20

1. Which of the following enzymes requires Adenosine Triphosphate (ATP) for its action?
   1. Argino Succinate lyase
   2. Argino Succinate synthetase

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   3. Arginase
   4. Glutaminase
2. Which of the following contributes nitrogen atoms to both purine and pyrimidine rings?
   1. Aspartate
   2. Carbamoyl phosphate

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   3. Carbon dioxide
   4. Glutamate
3. The greatest buffering capacity at physiological pH would be provided by a protein rich in which of the following amino acids?
   1. Serine
   2. Cysteine

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   3. Alanine
   4. Histidine
4. Purely ketogenic amino acid is
   1. Leucine
   2. Threonine

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   3. Isoleucine
   4. Tyrosine
5. RNA synthesis is different from DNA synthesis in the following ways, except:
   1. No efficient proofreading function during RNA synthesis
   2. Primer is not involved in RNA synthesis

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   3. DNA synthesis occurs with 5'-3' polarity, whereas RNA synthesis occurs with 3'-5' polarity
   4. 'U' replaces 'T' as the complementary base for 'A' in RNA synthesis
6. The translation factor which helps in forming ternary tRNA methionine complex is:
   1. elF2C
   2. elF4A

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   3. elF4B
   4. elF3
7. Nucleosomes are a fundamental unit of DNA organization. It consists of histones complexed to DNA. Histone proteins present in nucleosomes are rich in which of the following amino acids:
   1. Histidine and lysine
   2. Lysine and arginine

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   3. Arginine and histidine
   4. Histidine and valine
8. Which out of the following is not a product of tyrosine metabolism:
   1. Melanin
   2. Melatonin

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   3. Thyroxin
   4. Epinephrine
9. Which one of these inhibits adenylyl cyclase:
   1. ACTH
   2. ADH

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   3. Angiotensin II
   4. Glucagon
10. Which is the major intracellular cation:
    1. Na+
    2. K+

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    3. Ca2+
    4. Mg2+
11. Normal anion gap metabolic acidosis is caused by:
    1. Cholera
    2. Starvation

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    3. Ethylene glycol poisoning
    4. Lactic acidosis
12. The major urinary buffer is:
    1. Bicarbonate
    2. Phosphate

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    3. Protein
    4. Hemoglobin
13. Marker enzyme for Golgi complex is:
    1. Galactosyl transferase
    2. Catalase

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    3. Glucose 6 phosphatase
    4. None
14. Which of the following is a negative phase reactant
    1. C Reactive protein
    2. Albumin

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    3. Fibrinogen
    4. Ferritin
15. Plasmids contain a
    1. Circular single stranded DNA
    2. Linear single stranded DNA

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    3. Circular double stranded DNA
    4. Linear double stranded DNA
16. Which of the following immunoglobulin crosses placenta
    1. IgG
    2. IgM

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    3. IgE
    4. IgA
17. Which of the following activity is not seen in DNA polymerase I
    1. 5' - 3' polymerase
    2. 3'-5' polymerase

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    3. 5'-3' exonuclease
    4. 3' - 5' exonuclease
18. Highly repetitive DNA is seen in
    1. Telomere
    2. Centromere

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    3. Both
    4. None
19. Which enzyme defect is seen in Homocystinuria type I
    1. Methionine synthase
    2. Cystathionine beta synthase

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    3. Cystathioninase
    4. None of the above
20. All are involved in iron metabolism except
    1. Hepcidin
    2. Transthyretin

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    3. Ceruloplasmin
    4. Ferroprotein

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