medical MCQs – Page 380

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 Review each marked answer and report any item that may be outdated or unclear.

medical Mcqs

1. oral anatomy 2. microbiology 3. oral pathology and medicine 4. physiology 5. biochemistry 6. general anatomy 7. dental materials 8. pharmacology 9. pathology 10. oral histology

7581. The human plasma lipoprotein containing the highest percentage of triacylglycerol by weight is______________?
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A. Chylomicrons

B. LDL

C. HDL

D. VLDL

7582. Detoxification or protective synthesis occurs by____________?
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A. Oxidation

B. Any of the above

C. Reduction

D. Conjugation

7583. Highest binding of iron in plasma is seen with___________?
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A. Hemoglobin

B. Ceruloplasmin

C. Ferritin

D. Transferrin

7584. The class of amino acids that contains only non essential amino acids is_______________?
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A. Acidic

B. Aromatic

C. Basic

D. Branched chain

7585. The nitrogen of the body is supplied by______________?
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A. Triacyl glycerol

B. Glucose

C. Lipids

D. Proteins

7586. At PH 7 the binding of 2,3 DPG to hemoglobin occurs at which site ?
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A. Sulphydryl group

B. Amino terminal

C. Carboxy terminal

D. Histidine

7587. Thyroxine and catecholamines are derived from_____________?
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A. Tyrosine

B. Alanine

C. Tryptophan

D. Leucine

7588. Ketone bodies are by products of metabolism of_____________?
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A. Fat

B. Protein

C. Carbohydrate

D. All of the above

7589. Which is not seen in HMG CoA pathway ?
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A. Mevalonate

B. Pyruvate

C. Cholesterol

D. Acetyl CoA

7590. The best technique useful for initial viral load estimation is________________?
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A. Electrophoresis

B. Widal test

C. Real time PCR

D. Immunofluoresence

7591. The sigma subunit of prokaryotic RNA polymerase_______________?
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A. Specifically recognizes the promoter site

B. Is inhibited by a-amanitin

C. Binds the antibiotic Rifampicin

D. Is part of the core enzyme

7592. Which of the following amino acids is quickly converted to tyrosine ?
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A. Glycine

B. Phenylalanine

C. Arginine

D. Leucine

7593. Free radicals are chemical species which have______________?
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A. Single unpaired electron in an outer orbit

B. Double paired electron in an outer orbit

C. Double unpaired electron in an outer orbit

D. Single paired electron in an outer orbit

7594. Restriction endonuclease cleaves______________?
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A. Polypeptide

B. SIngle stranded RNA

C. Double stranded DNA

D. SIngle stranded DNA

7595. Which of the following is correct about breakdown of hemoglobin (Hb)_____________?
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A. Heme?Hb?Biliverdin?Urobilinogen

B. Hb?Heme?bilirubin?Urobilinogen?Biliverdin

C. Hb?Heme?bilirubin?Urobilinogen

D. Hb?Heme?Bilverdin?Uro bilinogen

7596. In Niemann-Picks disease the following substrance accumulate in CNS in excess______________?
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A. Phosphoinositides

B. Glycerophosphatides

C. Phosphosphingosides

D. Glycerosphingosides

7597. A small Ca+2 binding protein that modifies the activity of many enzymes and other proteins in response to changes of Ca+2 concentration is known as______________?
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A. Kinesin

B. Calmodulin

C. Collagen

D. Cycline

7598. Glycemic index of a starchy food is a measure of its________________?
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A. None of the above

B. Collectivity

C. Utility

D. Energy

7599. The amino acid residue having animino side chain is____________?
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A. Tyrosine

B. Proline

C. Histidine

D. Lysine

7600. Fatty acid oxidation occurs in______________?
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A. Microsomes

B. All of the above

C. Mitochondria

D. Cytoplasm

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