Which adaptation is acquired by plants of cooler areas to prevent lipid crystal formation in cell membrane?
Correct answer: C. Increase in proportion of unsaturated fatty acids.
- A. Change in membrane protein composition.
- B. Change in the solute composition of the cell membrane which prevents crystallization.
- C. Increase in proportion of unsaturated fatty acids.
- D. Development of heat shock proteins.
Explanation
Increasing unsaturated fatty acids keeps membrane lipids fluid at low temperatures because their bends prevent tight packing and crystal formation. Students may choose a because membrane proteins can also change during adaptation, but protein composition does not directly prevent lipid crystallization.
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About Thermoregulation
Thermoregulation maintains body temperature through negative feedback controlled mainly by the hypothalamus. It covers vasodilation and vasoconstriction, sweating, shivering, changes in metabolic heat production and behavioural responses, while distinguishing heat loss by radiation, conduction, convection and evaporation from temperature regulation itself.
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