Question 3 (1 point)
Why is a cell membrane like a phospholipid sandwich?
a) The lipid is the bread, and proteins are the spread.
b) It is a two-layered semipermeable structure with heads on the outside, tails in the middle, and heads on the inside.
c) It is a two-layered semipermeable structure with tails on the outside, heads in the middle, and tails on the inside.
d) It is a two-layered semipermeable structure with tails on the outside, tails on the inside, and heads in the middle.
e) It is a one-layered semipermeable structure with heads on the outside and heads on the inside.