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Sialic acid is also called as
EXPLANATION
Carbohydrates & Lipids
- Biochemical Identity of Sialic Acid: Sialic acid is the generic designation for a family of nine-carbon acidic amino sugars derived from neuraminic acid, with the predominant biological form being N-Acetylneuraminic acid (Neu5Ac).
- Biological Role: Neu5Ac occupies terminal positions on glycoprotein and glycolipid oligosaccharide chains on animal cell surfaces, providing negative surface charge and mediating cellular recognition, adhesion, and pathogen binding.
- Distinction from Other Amino Sugars: $N$-Acetylglucosamine (GlcNAc) and $N$-Acetylgalactosamine (GalNAc) are hexosamines, while $N$-Acetylmuramic acid (NAM) is a bacterial cell wall peptidoglycan component.
Correct option: (3) N-Acetyineuraminic acid
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