Biomolecules

Question 1

Fibrous proteins

Answer 1

The proteins which consist of linear thread like polypeptide chains arranged or twisted to form fibres

Question 2

Globular

Answer 2

Polypeptide chains folded in such a way so as to give a spheroidal shape

Question 3

Primary structure

Answer 3

This refers to the sequence of amino acids held together by peptide linkages

Question 4

secondary structure

Answer 4

In a protein , peptide chains are arranged in a definite shape. The determination of this shape gives the secondary structure of a protein.

Question 5

tertiary structure

Answer 5

the tertiary structure refers to the three dimensional shape of a protein molecule which results from the twisting bending and folding of the entire molecule

Question 6

quartenary

Answer 6

Some of the proteins are composed of two or more polypeptide chains/subunit; the spatial arrangement of these subunits with respect to each other

Question 7

Denaturation of a protein

Answer 7

The process which leads to the change in physical and biological properties of a protein without affecting its chemical composition is called denaturation

Question 8

Vulcanization

Answer 8

The natural rubber is a gummy like substance with poor elasticity. Therefore it gets permanently deformed on stretching. To make this rubber more useful, S-S cross linkages are introduced between the hydrocarbon chains in the natural rubber through a process called vulcanisation and the rubber obtained is vulcanized. Hence when the tension is removed (via stretching) the rubber resumes its original shape.