Neet mds 26 : daily mcqs test

🦠 DAILY 10 MCQs (NEET MDS 2026) — Corynebacterium diphtheriae • Coryneform bacteria • Elek test • Toxin • Culture — Timer 10 min ⏳

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Daily Test: Corynebacterium diphtheriae (10 MCQs)

Includes: morphology, metachromatic granules, Elek test, tox gene, clinical features, culture media & complications.

⏳ 10:00

Question 1 / 10

1) Corynebacterium diphtheriae is:

Gram-negative diplococci Acid-fast bacilli Gram-positive pleomorphic bacilli Spirochete

2) Metachromatic granules of C. diphtheriae are best seen with:

Ziehl–Neelsen stain Albert stain India ink Silver stain

3) Arrangement of C. diphtheriae on smear is classically:

Chains Clusters Diplococci Chinese letter / palisade

4) Diphtheria toxin is produced when bacteria are infected by:

Beta phage (lysogenic conversion) Alpha toxin plasmid only Spore formation Capsule gene activation

5) Mechanism of diphtheria toxin is:

Inhibits DNA gyrase Blocks cell wall synthesis Inhibits protein synthesis by ADP-ribosylation of EF-2 Forms pores in RBC membrane

6) A classical clinical feature of diphtheria is:

Rice-water stools Gray pseudomembrane in throat Vesicular rash on palms Black eschar

7) Culture medium used for C. diphtheriae isolation is:

TCBS agar MacConkey agar Thayer-Martin medium Löffler’s serum slope / Tellurite medium

8) Elek test is used to detect:

Diphtheria toxin production Capsule formation Motility Urease activity

9) Important complication of diphtheria toxin is:

Hepatitis Arthritis only Myocarditis and neuropathy Splenomegaly only

10) Vaccine used for diphtheria prevention is:

Live attenuated vaccine Toxoid vaccine Polysaccharide vaccine Killed whole cell vaccine

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Topic: Corynebacterium diphtheriae

⏳ Timer: 10 minutes | 10 Questions

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