NEET 2022, Biology Q39: Biomacromolecules
Read the following statements on lipids and find out correct set on statements :
(a) Lecithin found in the plasma membrane is a glycolipid
(b) Saturated fatty acids possess one or more c = c bonds
(c) Gingely oil has lower melting point, hence remains as oil in winter
(d) Lipids are generally insoluble in water but soluble in some organic solvents
(e) when fatty acids is esterified with glycerol, monoglycerides are formed
Choose the correct answer from the options given below :
- A
(a), (b) and (c) only
- B
(a), (d) and (e) only
- C
(c), (d) and (e) only
- D
(a), (b) and (d) only
Evaluate each statement.
(a) Lecithin is a phospholipid (phosphatidylcholine), not a glycolipid. Incorrect.
(b) Saturated fatty acids contain only single bonds; one or more C=C bonds indicate unsaturation. Incorrect.
(c) Gingelly (sesame) oil consists mainly of unsaturated fatty acids and has a low melting point, so it stays liquid even in winter. Correct.
(d) Lipids are typically insoluble in water (hydrophobic) but soluble in non-polar organic solvents such as chloroform, ether, and benzene. Correct.
(e) Esterification of one molecule of fatty acid with glycerol yields a monoglyceride (one fatty acid attached to glycerol). Correct.
So (c), (d) and (e) are correct.
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