QUESTION4 The antimicrobial agent, nystatin, binds to sterols. This drug affects

Question

QUESTION4 The antimicrobial agent, nystatin, binds to sterols. This drug affects: O A. mycoplasmas. O B. gram-negative bacteria. O C.gram-positive bacteria. O D. All of the above QUESTION5 Which of the following pairs is not correctly matched? O A acid-fast-Mycobacterium tuberculosis B. centriole-Bacillus subtilis O C. endospore-Clostridium perfringens OD. capsule-Streptococcus pneumoniae QUESTION 6 In Eukaryotes, the cytoskeleton is formed by two fillaments; microtubules and flagellin. True False

Explanation / Answer

Answer 4: A) Mycoplasma

Nystatin shows antifungal activity by binding to sterols in the fungal cell membrane. The drug is not active against bacteria.

Mycoplasma are cells that lack a cell wall around their cell membranes but their plasma membrane contains sterol. Nystatin thus acts on mycoplasma.

Answer 5: B) Centriole - Bacillus subtilis

Among all this is not a staining method. Gram stain procedure is used to stain Bacillus subtilis.

Answer 6: False

In eukaryotes, the cytoskeleton is formed by microfilaments, intermediate filaments, and microtubules.

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