CBME
DR. YSR UNIVERSITY OF HEALTH SCIENCES:AP:VIJAYAWADA-520 008
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MBBS DEGREE EXAMINATION – DECEMBER, 2023
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) 1x20=20
1) Which of the following amino acid can give rise to a vitamin
a. Thyptophan
b. Proline
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c. Histidine
d. Phenylalanine
2) Which amino acid does not undergo transamination
a. Lysine
b. Serine
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c. Glutamate
d. Valine
3) The two nitrogen atoms of urea are delivered from
a. Ammonia and arginine
b. Ammonia and aspartate
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c. Ammonia and alanine
d. Ammonia and creatinine
4) The amino acid which does not allow formation of alpha helix is
a. Glutamate
b. Glycine
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c. Aspartic acid
d. Proline
5) Driving Denovo synthesis of pyrimidine nucleotide which nucleotide is first synthesized
a. IMP
b. CMP
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c. UMP
d. CMP
6) The drug of choice for treating primary gout is:
a. Allopurinol
b. Aspirin
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c. Tetracycline
d. Colchicine
7) The daily requirement of iron in adult is
a. 10-20 microgram
b. 10-20 gram
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c. 0.1-0.5 mg
8) Hyperparathyroidism is characterized by all the following except:
a. Osteoporosis
b. Hypercalciuria
c. Alkalosis
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9) DNA finger printing is based on unique
a. Tandam repeats
b. Blood group
c. Mutagens
d. Coding sequence
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10) Hemoglobin carries
a. Free bilirubin
b. Free hemoglobin
c. Free heme
d. Free iron
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11) Which is not a transcription initiation signal?
a. CAAT box
b. Hogness box
c. Pribnow box
d. Homeo box
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12) Nucleosome is
a. Alternate name for nucleolus
b. Promoter sequence for transcription
c. DNA-RNA complex present in nucleus
d. DNA wrapped around histones
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13) Causes of metabolic alkalosis includes all the following except:
a. Continuous gastric aspiration
b. Ingestion of antacids
c. Prolonged vomiting
d. Hyperventilation
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14) Which of the following is not a contractile protein?
a. Tubulin
b. Actin
c. Desmosine
d. Dynen
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15) Alpha fetoprotein level is increased in serum in
a. Hepatoma
b. Hyperthyroidism
c. Nephritis
d. Urinary tract infection
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16) The following compounds can act as secondary messenger except:
a. Calcium ions
b. Inositol triphosphate
c. ATP
17) ATP synthase is a marker enzyme present in
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a. Golgi complex
b. Cytoplasm
c. Mitochondria
d. Lysosome
18) Peroxisomes are
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a. Site of oxidative phosphorylation
b. Site of protein synthesis
c. Concerned with drug detoxification
d. Involved in production of free radicals
19) Oncogenes are activated by all, except:
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a. Viral infection
b. Promoter insertion
c. Mutation in proto oncogene
d. Reverse transcriptase
20) Proximal Renal tubular acidosis is characterized by all except:
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a. Anemia
b. Urinary pH 4,5
c. Normal anion gap acidosis
d. Hyperchloremia
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