9. There are two properties of phospholipids that affect how tightly they pack t

Question

9. There are two properties of phospholipids that affect how tightly they pack together: the length of the hydrocarbon chain and the number of double bonds. The degree of packing, in turn, influences the relative mobility of these molecules in the membrane. Which of the following would yield the most highly mobile phospholipid (listed as number of carbons and number of double bonds, respectively)? Circle one option (3 points).

(a) 24 carbons with 1 double bond

(b) 15 carbons with 2 double bonds

(c) 20 carbons with 2 double bonds

(d) 16 carbons with no double bond

Explanation / Answer

The carbon chain length determines the force between lipids , greater the carbon length, more is the force less is the mobility. Whereas double bond is proportional to mobility because they confer instability as particles dont stack each other well. So more is the number of double bond ,more is the mobility. Hence answer would be :

B-15 carbon with 2 double bonds.

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