Membrane Structure and Function
Peptidoglycan is a complex consisting of

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

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Membrane Structure and Function
In Fluid mosaic model, the biological membrane can be viewed as

two dimensional solutions of oriented lipids and globular proteins
three dimensional solutions of oriented lipids and carbohydrate
two dimensional solutions of oriented lipids and carbohydrate
three dimensional solutions of oriented lipids and globular proteins

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