Download NTRUHS 1st Year MBBS 2023 January Biochemistry Paper II Question Paper

Download NTRUHS (Dr.NTR University of Health Sciences) MBBS (Bachelor of Medicine, Bachelor of Surgery) First Year (1st Year) 2023 January Biochemistry Paper II Previous Year Question Paper || For More Question Papers, Notes and Important Questions Download MBBS Question Bank APP

CBME
DR. YSR UNIVERSITY OF HEALTH SCIENCES:AP:VIJAYAWADA-520 008
MBBS DEGREE EXAMINATION ? JANUARY, 2023
FIRST M.B.B.S. EXAMINATION
BIOCHEMISTRY ? PAPER-II (Set B)
(Multiple Choice Questions)
Time: 20 Minutes Max Marks: 20
Note: Answer all questions
__________________________________________________________________________
SECTION ? I (MCQs- 20 MARKS) 1x20=20
1) In pheochromocytoma, there is excess synthesis of
a. Vanillyl mandelic acid
b. Polyamines
c. Hippuric acid
d. Indole acetic acid
2) Acetylcholine can be synthesized from which amino acid:
a. Tyrosine
b. Serine
c. Threonine
d. Tryptophan
3) Ammonia is trapped in the brain by:
a. Glutamine synthase reaction
b. Carbamoyl phosphate synthase 1
c. Citrate synthase

---

d. Glutamate dehydrogenase
4) Tertiary structure of protein describes:
a. The sequence of amino acids
b. The location of disulfide bonds
c. Amino terminal end amino acid
d. The nature of protein folding
5) Formation of dTMP requires
a. Coenzyme A
b. NADPH
c. Vitamin C
d. Molybdenum
6) Secondary hyperuricemia is present in all the following conditions
a. Polycythemia
b. Cytotoxic drug therapy
c. Leukemia
d. Hepatitis
7) Which of the below mentioned enzyme does not contain copper:
a. Cytochrome oxidase
b. Superoxide dismutase
c. Xanthine oxidase
d. Tyrosinase

---

8) Zinc is constituent of all the following enzymes except:
a. Alkaline phosphatase
b. Amylase
c. Carbonic anhydrase
9) Which of the enzyme listed below is heat stable?
a. Restriction endonuclease
b. Thermo thermophilus
c. Reverse transcriptase
d. Enterokinase
10) The following are the vectors for gene therapy except:
a. Retrovirus
b. E. Coli
c. Adenovirus
d. Liposome
11) Unusual nucleotide bases are found in significant quantity in:
a. Messenger RNA
b. Ribosomal RNA
c. Transfer RNA
d. snRNA
12) Denaturation of DNA is accompanied by all the following changes except:
a. Hyperchromicity
b. Increase in viscosity

---

c. Unstacking of base
d. Double helix structure
13) Administration of diuretics causes loss of potassium ions which can lead to:
a. Metabolic alkalosis
b. Metabolic acidosis
c. Respiratory acidosis
d. Respiratory alkalosis
14) Hydroxylation occurs in which of the following amino acids in collagen:
a. Threonine
b. Alanine
c. Lysine
d. Tryptophan
15) Which of the following is due to tumor suppressor mutation?
a. Retinoblastoma
b. Hyperthyroidism
c. Cystic Fibrosis
d. Sickle cell disease
16) The uptake of iodine by thyroid gland is inhibited by:
a. Fluoride
b. Perchlorate
c. Bromide
d. Chloride

---

17) The following is not an acute phase protein:
a. CRP
b. Ceruloplasmin
c. HDL
d. Haptoglobin
18) Sodium potassium pump is inhibited by:
a. Aspirin
b. Digoxin
c. Methotrexate
d. Rifampicin
19) Oncogenes are specific sequences in DNA:
a. That are tumor markers
b. When expressed produce cancer
c. That code for reverse transcriptase
d. Required for DNA replication
20) Patients treated with carbonic anhydrase inhibitor can develop:
a. Metabolic acidosis
b. Respiratory acidosis
c. Respiratory alkalosis
d. Metabolic alkalosis
**********

---