Question

peptidoglycan is composed of ______.
lipids and nucleotides
lipids and amino acids
sugars and lipids
sugars and nucleotides
sugars and amino acids
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Explanation:

Peptidoglycan is a major component of bacterial cell walls. It is made up of sugar (glycan) chains cross - linked by short peptide (composed of amino acids) bridges. So it is composed of sugars and amino acids. The other options are incorrect: lipids are not a major component of peptidoglycan, and nucleotides are part of nucleic acids, not peptidoglycan.

Answer:

sugars and amino acids (the option with "sugars and amino acids")