Homework Answers
1. why plasma membrane is called ' bilayer' ?
the bilayer is two thick layers of phospholipids arranged with
its hydrophobic end directed towards the opposite side and the film
and its hydrophilic end-directed outwards.so the correct option is
a) there are two opposing layers of phospholipids in the
membrane.
2. what part of phospholipid is non-polar?
there are two parts of the phospholipid molecule. first is polar
phosphate head which is hydrophilic so they face outward and
non-polar lipid tail which is hydrophobic so face inward. so
correct option is a) lipid tail
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