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

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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
   2. 2 and 3

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

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

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

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

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

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

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   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. Iodine number
   2. Reichert Meisel number

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

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

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

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

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

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

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

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

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    3. CI-
    4. All of them
17. In a normal adult man, the amount of triacylglycerol stored is
    1. 40 kg
    2. 35 kg

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

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    3. Fat
    4. Vitamins
19. The final common pathway for oxidation of major foodstuff is
    1. Glycolysis
    2. Kreb's cycle

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    3. HMP shunt
    4. ß-oxidation
20. One of the following is the most important essential fatty acid in the diet
    1. Linoleic acid
    2. Arachidonic acid

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    3. Oleic acid
    4. Palmitic acid