Download NTRUHS 1st Year MBBS 2023 April Biochemistry Paper I Question Paper

Dr YSR UNIVERSITY OF HEALTH SCIENCES: VIJAYAWADA- 520008

MBBS DEGREE EXAMINATION - APRIL, 2023

FIRST M.B.B.S. EXAMINATION

BIOCHEMISTRY- PAPER-I (SET-C)

(Multiple Choice Questions)

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Time: 20 Minutes

Max Marks: 20

Note: Answer all questions.

SECTION-I (MCQs - 20 MARKS) 1X2=20

1. The number of carbon atoms involved in the osazone formation:
   1. 1 and 2

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   2. 2 and 3
   3. 3 and 4
   4. 5 and 6
2. Polysaccharide which is composed by β-glycosidic bonds:
   1. Starch

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   2. Glycogen
   3. Dextrin
   4. Cellulose
3. One of the following is an amphipathic lipid:
   1. Phospholipids

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   2. Fatty acid
   3. Bile salts
   4. All of the above
4. The glycosaminoglycan that serves as an anticoagulant:
   1. Heparin

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   2. Hyaluronic acid
   3. Chondroitin sulfate
   4. Dermatan sulfate
5. The coenzyme not involved in hydrogen transfer:
   1. FMN

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   2. FAD
   3. NADP+
   4. FH4
6. Esterification of cholesterol occurs at carbon position:
   1. 1

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   2. 2
   3. 3
   4. 4
7. In the feedback regulations, the end product binds at
   1. Active site

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   2. Allosteric site
   3. E-S complex
   4. None of the above
8. Test employed to check the purity of butter through the estimation of volatile fatty acids is
   1. lodine number

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   2. Reichert Meisel number
   3. Saponification number
   4. Acid number
9. The coenzyme directly concerned with the synthesis of biogenic amines
   1. TPP

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   2. NADP+
   3. Biotin
   4. Pyridoxal phosphate
10. Formimino glutamic acid is excreted in urine in the deficiency of Vitamin
    1. Riboflavin

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    2. Folic acid
    3. Biotin
    4. Vit C
11. The enzyme that converts trypsinogen to trypsin is
    1. Secretin

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    2. Chymotrypsin
    3. Elastase
    4. Enteropeptidase
12. Active form of Vitamin D is
    1. Cholecalciferol

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    2. Ergocalciferol
    3. Dehydrocholesterol
    4. Calcitriol
13. Inner mitochondrial membrane is impermeable to
    1. H+

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    2. K+
    3. OH-
    4. All of them
14. The number of heme groups present in myoglobin
    1. 1

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    2. 2
    3. 3
    4. 4
15. Vandenbergh reaction in hemolytic jaundice is
    1. Indirect positive

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    2. Direct positive
    3. Biphasic
    4. None of these
16. The substance that facilitates the release of O2 from oxyhemoglobin
    1. 2,3, BPG

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    2. H+
    3. Cl
    4. All of them
17. In a normal adult man, the amount of triacylglycerol stored is
    1. 40 kg

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    2. 35 kg
    3. 25 kg
    4. 15 kg
18. Foodstuff with the highest specific dynamic action is
    1. Protein

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    2. Carbohydrate
    3. Fat
    4. Vitamins
19. The final common pathway for oxidation of major foodstuff is
    1. Glycolysis

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    2. Kreb's cycle
    3. HMP shunt
    4. β-oxidation
20. One of the following is the most important essential fatty acid in the diet
    1. Linoleic acid

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    2. Arachidonic acid
    3. Oleic acid
    4. Palmitic acid

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