Penicillin kills susceptible bacteria by inhibiting the enzyme that builds the
Correct answer: C. bacterial cell wall
- A. bacterial DNA
- B. bacterial ribosomes
- C. bacterial cell wall
- D. bacterial flagellum
Explanation
Penicillin blocks the transpeptidase that crosslinks the peptidoglycan wall, so a growing bacterium bursts under its own osmotic pressure. Human cells have no wall at all, which is why the drug is selectively toxic.
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About Characteristics of Enzymes
Enzymes are globular biological catalysts that lower activation energy without being consumed, usually showing specificity for particular substrates. Questions cover active sites, enzyme substrate complexes, the lock and key and induced fit models, intracellular and extracellular action, and the effects of denaturation, while distinguishing enzymes from non biological catalysts.
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