General Knowledge - General Science - Discussion


The major ingredient of leather is

[A]. collagen
[B]. carbohydrate
[C]. polymer
[D]. nucleic acid

Answer: Option A


No answer description available for this question.

Dr M Degra said: (Jun 7, 2012)  
Collagen is animal protein

Sr Degra said: (Mar 1, 2013)  
Collagen has an unusual amino acid composition and sequence:.

Glycine is found at almost every third residue.

Proline (Pro) makes up about 17% of collagen.

Collagen contains two uncommon derivative amino acids not directly inserted during translation. These amino acids are found at specific locations relative to glycine and are modified post-translationally by different enzymes, both of which require vitamin C as a cofactor.

Hydroxyproline (Hyp) , derived from proline.

Hydroxylysine (Hyl) , derived from lysine (Lys). Depending on the type of collagen, varying numbers of hydroxylysines are glycosylated (mostly having disaccharides attached).

Cortisol stimulates degradation of (skin) collagen into amino acids.

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