Arctic and Antarctic fishes have unsaturated fatty acids. Why ?
Unsatured fatty acids help to maintain the fluid nature of the cell mebrane and prevent it from freezing in the cold climate. They also provide insulation from the cold. The fluid nature of the cell membrane is very important for various life processes. Therefore, in order to keep their membranes flexible and insulation the Artic and Antarctic fishes have unstaurated fatty acids.
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What are cutins and suberins ?
Cutin and suberins are plant lipids. Cutin is deposited in the outer (exposed) cell wall of epidermal cells of leaves. Suberin is deposited in the secondary cell wall of cork cells.
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What are the functions of cholesterol?
Cholesterol performs a variety of functions.
(1) Cholesterol is a component of plasma membrane.
(2) The cholesterol is a parent compound from which many hormones.
(3) Cholesterol produces bile salts.
(4) It maintains the fluidity of the cell membrane in cold conditions.