Membrane Structure and Function
Peptidoglycan is a complex consisting of

aminoacid and carbohydrate
mono-saccharide and protein
polysaccharide and protein
oligo-saccharide and protein

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Membrane Structure and Function
Cholesterol is somewhat amphipathic due to

the three six-membered rings along with the single five-membered ring
the long branched hydrocarbon along with the four hydrocarbon rings
the single hydroxyl along with the hydrocarbon nature of the remainder of the molecule
the five-methyl groups along with the hydrocarbon chain

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