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Biomolecules — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryBiomolecules2 Marks
Question
Differentiate between globular and fibrous proteins.
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Answer

(i) In fibrous proteins, the polypeptide chains run parallel and are held together by hydrogen and disulphide bonds to form a fibre like structure, whereas in globular proteins, the polypeptide chains form a coil to give a spherical shape.
(ii) Fibrous proteins are insoluble in water while globular protiens are soluble in water.
(iii) Examples of fibrous proteins are keratin (present in hair, wool, silk) and myosin (present in muscles) and examples of globular proteins are insulin and albumins.

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