Microbiology — Questions

Select all differences that can provide bacterial targets for selective antimicrobial action.

• Selective toxicity guarantees no adverse host effects
• Bacterial cytoplasmic ribosomes differ from human cytoplasmic ribosomes
• Bacteria and human cells have identical target structures in every respect
• Most bacterial walls contain peptidoglycan absent from human cells

An antimicrobial inhibits bacterial multiplication without directly killing the population in the stated laboratory conditions. Which activity is this?

• Sporulation
• Viral neutralization
• Bactericidal
• Bacteriostatic

A compound interferes with penicillin-binding proteins and peptidoglycan cross-linking. Which target process is affected?

• Retroviral reverse transcription
• Fungal ergosterol production
• Host nuclear DNA packaging
• Bacterial cell-wall synthesis

Antimicrobial selection means that each bacterium intentionally chooses the mutation it needs.

• True
• False

Which arrangement most characteristically describes staphylococci?

• Long filamentous hyphae
• Chains of cocci
• Clusters of cocci
• Spiral rod-shaped cells