Penicillins target is transpeptidase a protein involving cell wall synthesis For a gram positive bacterium which of the following mechanism would be most effective
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Penicillins inhibit transpeptidase, an enzyme crucial for cross-linking peptidoglycan layers in the bacterial cell wall. Show more…
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Scientific Reasoning: For the antibiotic Pencillin, which of the following most accurately describes the mode of action? antimetabolite which blocks metabolism blocks protein synthesis blocks RNA transcription blocks DNA replication targets cell wall synthesis targets the cytoplasmic membrane Due to this mechanism, you expect this antibiotic to be effective against: most gram-negative species most gram-positive species no bacterial species both gram-positives and gram-negatives
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Antibiotic Mode of Action Ampicillin inhibits cell wall synthesis Bacitracin inhibits cell wall synthesis Chloramphenicol prevents protein assembly by ribosomes Nalidixic Acid inhibits DNA replication Penicillin inhibits cell wall synthesis 1) Which of these antibiotics do you predict will work better to inhibit growth in gram-positive bacteria relative to gram-negative bacteria? Why? 2) Which of these antibiotics do you predict to be best at inhibiting the growth of both gram-positive and gram-negative bacteria? Why?
Penicillin is a potent antibiotic. It binds covalently with a serine residue at the transpeptidase active site and prevents this enzyme from synthesizing the bacterial cell wall. Which of the following is the most likely mechanism of action of penicillin? a. Penicillin acts as a reversible competitive inhibitor. b. Penicillin is an allosteric regulator. c. Penicillin behaviors like an allosteric, non-competitive inhibitor. d. Penicillin is an irreversible inhibitor. e. Penicillin acts as a reversible, non-competitive inhibitor.
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