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Cell Wall Antibiotics

View the animation below, then complete the quiz to test your knowledge of the concept.






1Which of the following reactions are inhibited by bacitracin?
A)bactoprenol–phosphate -> bactoprenol + phosphate
B)bactoprenol + phosphate -> bactoprenol–phosphate
C)bactoprenol–diphosphate ->bactoprenol–phosphate + phosphate
D)bactoprenol–diphosphate -> bactoprenol + 2 phosphate
E)bactoprenol + 2 phosphate -> bactoprenol–diphosphate



2Cycloserine
A)inhibits the synthesis of the precursor D-alanyl-D-alanine.
B)breaks down the D-alanyl-D-alanine portion of the pentapeptide side chain.
C)inhibits the formation of N-acetyl glucosamine.
D)prevents the binding of N-acetyl glucosamine to N-acetyl muramic acid.
E)blocks the transport of precursors out of the cytoplasm.



3The enzyme _______ ensures bacterial cell wall rigidity by catalyzing the formation of cross-links between the peptide side chains of peptidoglycan.
A)translocase
B)transpeptidase
C)transglycosylase
D)decarboxylase
E)deaminase



4Vancomycin prevents the formation of cross-links between peptide side chains.
A)True
B)False



5Penicillin breaks existing peptidoglycan cross-links.
A)True
B)False







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