Download VNSGU MBBS First Year 2013 June JJ 4006 O Biochemistry Paper I Question Paper

Date of issue:

Sup. Sign.:

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Seat No.:

JJ-4006-O

First Year M. B. B. S. Examination

June-2013

Biochemistry: Paper - II

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Time: 10 Minutes] [Total Marks: 10

OBJECTIVE QUESTIONS

Instruction:

Fill up strictly the details of signs on your answer book.

Name of the Examination:

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F. Y. M.B.B.S.

Name of the Subject:

Biochemistry-2

Subject Code No. 4006 - Section No. (1, 2) Nil Student's Signature

5 MCQ(no negative marking) Choose single best answer 10

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1. Following can be stored in body in quantity sufficient to last few years:
   1. Vitamin B₁
   2. Vitamin C
   3. Vitamin B₁₂
   4. Vitamin B₆

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2. A patient has had a series of blood clots, and has been placed on warfarin to reduce such incidents. Warfarin exerts its effect by blocking which of the following?
   1. Platelet biogenesis
   2. Phospholipid synthesis
   3. Clotting factor protein synthesis
   4. Formation of y-carboxyglutamate

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3. A 42-year-old woman presents with tiredness and lethargy. She has tingling in her hands and feet. Blood work shows a macrocytic anemia, along with elevated homocysteine levels. One would also expect to see elevated levels of which metabolite?
   1. Ketone bodies
   2. Methylmalonic acid
   3. Propionic acid
   4. Succinate

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4. Most prominent DNA damage by UV light is
   1. double strand breakage
   2. base substitution
   3. pyrimidine dimer
   4. purine dimer

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5. Oncogenes commonly code for all except
   1. growth factors
   2. growth factor receptors
   3. tyrosine kinase
   4. proteins involved in DNA repair

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6. Hemopexin binds to
   1. Free Heme
   2. oxidized Hemoglobin
   3. Free Iron
   4. reduced hemoglobin

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7. When DNA point mutation occur, following is transversion,
   1. A->C
   2. A->G
   3. T->C
   4. C->U

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8. Niacin can be formed from
   1. Thiamine
   2. Threonine
   3. Tyrosine
   4. Tryptophan

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9. Non competitive inhibitors:
   1. Increase K_m
   2. Do not affect V_max
   3. Decrease K_m
   4. Decrease V_max

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10. Pyridoxal phosphate is required as a coenzyme in:
    1. Transamination
    2. Transulphuration
    3. Deamination
    4. Transketolation

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