medical MCQs – Page 178

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

3541. Which of the following is precursor of adrenaline and thyroxine synthesis ?
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A. Phenyl alanine

B. Tyrosine

C. Tryptophan

D. None of the above

3542. A child has 12 permanent and 12 decidous teeth, what is his age____________?
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A. 13 years

B. 11 years

C. 8 years

D. 4 years

3543. First permanent molars begin to calcify at ______________?
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A. Before decidous incisors

B. 6 months of intra utrerine life

C. About 1 year after birth

D. At birth
3544. Daily requirement of iron in man is_____________?
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A. 20 mg

B. 1gm

C. 10 mg

D. 10 microgram

3545. Which of the following has a ketogenic effect on livers______________?
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A. GH

B. Androgen

C. Glucagon

D. Insulin

3546. Which of the following is not a second messenger ?
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A. c GMP

B. Phosphatidyl inosital

C. Phosphatidyl glycerol

D. c AMP

3547. Thyroxine and catecholamines are derived from_____________?
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A. Tryptophan

B. Leucine

C. Tyrosine

D. Alanine

3548. HMG-CoA is formed during metabolism of all except______________?
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A. Leucine

B. Cholesterol

C. Bile acids

D. Ketone bodies

3549. Fat provides ______% of bodys calories?
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A. 30%

B. 50%

C. 40%

D. 75%

3550. The major lipids that make up the cell membrane are_______________?
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A. Sphingomyelins

B. Triglycerides

C. Fatty acids

D. Phospholipids
3551. To keep blood PH at 7.4 the HCO3 : H2CO3 ratio should be_____________?
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A. 30:01:00

B. 15:01

C. 20 : 1

D. 1:01

3552. FSH, LH, TSH acts through_________________?
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A. Cyclic AMP

B. Calcium release

C. Adenosine cyclate

D. Cyclic GMP

3553. Restriction endonuclease cleaves______________?
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A. Polypeptide

B. SIngle stranded RNA

C. Double stranded DNA

D. SIngle stranded DNA

3554. Maxillary primary cuspid enamel completion takes place at______________?
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A. 6 months in utero

B. 6 months after birth

C. 9 months after birth

D. 9 months in utero

3555. Mesiodistal width is more than cervico- incisal length of crown in_____________?
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A. Permanent maxillary canines

B. Permanent mandibular lateral incisors

C. Decidous maxillary central incisors

D. Permanent central incisors

3556. The product of oxidation of odd chainfatty acids is______________?
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A. Propionyl CoA

B. Fumaryl CoA

C. Malonyl CoA

D. Aceto acetyl CoA

3557. The abundant glycoprotein in the basement membrane and has binding domain for both ECM and cell-surface receptor is______________?
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A. E Cadherins

B. Tenascin

C. Fibronectin

D. Laminin
3558. Adipose tissue releases free fatty acids in the________________?
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A. Resting state

B. All of the above

C. Fasting state

D. Active state

3559. In anxious parent calls you that her 5- month -old child has still no teeth in his mouth then you should_____________?
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A. Tell her that it is normal at this age

B. Call and do radiographic survey

C. Child has retarded growth

D. Systemic problem

3560. On complete hydrolysis of DNA we will get all the following except______________?
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A. Phosphoric acid

B. Deoxy pentose sugar

C. Adenosine

D. Purine bases