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Collagen is a major fibrous protein of connective tissue occurring as white fibres produced by fibroblast.

1. (a) Collagen is a major fibrous protein of connective tissue occurring as white fibres produced by fibroblast.
2. (b) Besides polypeptides, conjugated proteins possess additional groups, metals or ions. Nucleoproteins are proteins associated with nucleic acids. Lipoproteins are proteins associated with lipids.
3. (c) Chromoproteins are proteins associated with pigments. Glycoproteins are proteins with a simple or complex sugar residue at their n-terminal.
4. (d) Essential amino acids are those which cannot be synthesized in the body from precursors. These amino acids must be present in our diet. They are valine, leucine, isoleucine,

Correct answer: (a) Collagen is a major fibrous protein of connective tissue occurring as white fibres produced by fibroblast.

Solution

The correct option is the one that directly restates the given sentence about collagen. It identifies collagen as a major fibrous protein of connective tissue, describes it as white fibres, and notes it is produced by fibroblasts.

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