Membrane Structure and Function
Peptidoglycan is a complex consisting of

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

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

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

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