AP BIOLOGY

Detailed explanation-1: -The fatty acid chains are the uncharged, nonpolar tails, which are hydrophobic. Since the tails are hydrophobic, they face the inside, away from the water and meet in the inner region of the membrane. Since the heads are hydrophilic, they face outward and are attracted to the intracellular and extracellular fluid.

Detailed explanation-2: -Each lipid molecule contains two parts; a head and a tail. The head is polar and hydrophilic ( Water loving) and the tail is non-polar and hydrophobic( Water hating).

Detailed explanation-3: -This makes phospholipid molecules have a hairpin shape. The head of the hairpin is very polar and therefore likes to associate with water (it is hydrophilic), while the two fatty acid chains (the “tails") are very non-polar and tend to avoid water (hydrophobic) and associate with other hydrocarbon chains.

Detailed explanation-4: -Non-polar tail of the lipids is hydrophobic. Lipids are present in double layer. Q. Cell membrane is made up of a phospholipid bilayer, with the phosphate group forming the head and the lipid chain forming the tail.