Question

which characteristic of a phospholipid contributes to the fluidity of the membrane? a saturated fatty acid tail cholesterol content double bonds in the fatty acid tail the head

Explanation:

Double - bonds in fatty acid tails create kinks, preventing tight packing of phospholipids and increasing membrane fluidity. Saturated fatty acid tails pack tightly reducing fluidity. Cholesterol can both increase and decrease fluidity depending on temperature, but double - bonds directly contribute to fluidity by disrupting packing. The head is not related to this aspect of fluidity.

Answer:

C. Double bonds in the fatty acid tail