Question

which of the following is not true :

a) Lipids are made up of fatty acids and glycerol.

b) Lipids are less soluble in water.

c) All membranes in living cells contain lipids.

d) Unsaturated fatty acids have higher melting point than saturated fatty acids.

Answer 1

D. Unsaturated fatty acids have higher melting point than saturated fatty acids.

Is the statement which is not correct.

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Answer 2

"Unsaturated fatty acids have a higher melting point than saturated fatty acids", is not True. ( Option - d)

• Saturated fatty acids have long chains and perfectly stack with each other forming a non-flexible rigid kind of structure leading to a strong bonding and higher melting point.
• Unsaturated fatty acids consist of double bonds which leads to the introduction of a kink and improper arrangement of fatty acids and loose packing leading to a lower melting point as compared to saturated fatty acids.
• The Melting point is the temperature at which the solid state of a substance converts to its liquid state.