medical MCQs – Page 468

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 Review each marked answer and report any item that may be outdated or unclear.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

9341. Which one of the following drugs is not a non depolarizing competitive neuromuscular blocker ?
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A. Doxacurim

B. Rocuronium

C. Mivacurium

D. Decamethonium

9342. Mechanism of action of beta-lactam antibiotics would be______________?
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A. Inhibition of cell wall peptidoglycan synthesis by competitive inhibition of transpetidases

B. Inhibition of bacterial protein synthesis by binding to subunit of bacterial ribosomes

C. Inhibition of DNA synthesis by inhibiting DNA-Dependent RNA polymerase

D. Reduced drug causes strand breaks in DNA

9343. Which of the following penicillins has the best gram negative spectrum ?
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A. Ampicillin

B. Methicillin

C. Cefixime

D. Penicillin V

9344. Tetracycline acts on______________?
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A. Cell membrane

B. Inhibiting DNA gyrase

C. 50S ribosomes

D. 30S ribosomes

9345. Which of the following can be given as a single dose antimalarial for P.vivax malaria______________?
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A. Atovaquone + Proguanil

B. Pyrimethamine + Sulfadoxime

C. Quinine + Tetracycline

D. Artemisinin

9346. Which among the following is the drug of choice for clostridium difficile induced colitis ?
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A. Metronidazole

B. Linezolid

C. Gentamicin

D. Ciprofloxacin

9347. Penicillin is effective against_____________?
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A. Neisseria gonorrhoeae

B. Neisseria meningitis

C. Treponema Pallidum

D. All of the above

9348. Topical Antifungal agent in candidiasis is______________?
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A. Ornidazole

B. Propronolol

C. Clotrimoxazole

D. Clotrimazole

9349. All are true about metformin except_____________?
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A. Reduce hepatic glucose production

B. Inhibits cellular respiration in mitochondria

C. Used in decompensated heart failure

D. Excreted unchanged in urine

9350. A patient taking beta-blocker preoperatively, at induction of anaesthesia with fentanyl. Which muscle relaxant should be avoided ?
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A. Pancuronium

B. Vecuronium

C. Atracurium

D. Rocuronium

9351. In which of the following categories are ephedrine, tyramine and emphetamine classified________________?
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A. Direct acting sympathomimetics

B. Indirect acting sympathomimetics

C. Anticholinesterases

D. Alpha-adrenergic blocking agents

9352. All of the following cephalosporines are active against Pseudomonas Except_____________?
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A. Cefaclor

B. Ceftazidine

C. Cefotaxime

D. Cefoperazone

9353. Bacitracin is a_______________?
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A. Oral antibiotic

B. Topical antibiotic

C. All of the above

D. Parenteral antibiotic

9354. Drug chemically related to penicillins is_____________?
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A. Cephalosporin

B. Tetracycline

C. Lincemycin

D. Sulphonamide

9355. Which of the following statements is not correct regarding warfarin_____________?
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A. In a racemic mixture the R form is four times more active than the S form

B. Better avoided during pregnancy as it may causes skeletal deformity of the foetus

C. Transient hypercoagulability is seen

D. The anticoagulant effect is seen only after 72 hours of administration

9356. Which of the following drugs is used therapeutically during allergic conditions ?
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A. Succinylcholine

B. Epinephrine

C. Sulfonamides

D. Tetracycline

9357. Antibiotic that achieves high concentration in Hard tissue, because of its molecular size is______________?
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A. Clindamycin

B. Ciprofloxacin

C. Erythromycin

D. Ceftum

9358. Drug which is most unsafe during pregnancy is____________?
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A. Ethambutol

B. B & C

C. Streptomycin

D. Kanamycin

9359. Roxithromycin is______________?
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A. Long acting polypeptide

B. Short action quinolone

C. A long acting macrolide

D. Short acting macrolide

9360. Which of the following antibiotics is found at much higher concentrations in cervicular fluid than in serum ?
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A. Metronidazole

B. Tetracyline

C. Penicillin

D. Clindamycin

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