Question

Which of the following is characteristic of phospholipids of plasma membrane?

• A. One non-polar head and two polar tails
• B. One polar head and two non-polar tails
• C. Two non-polar heads and one polar tail
• D. Two polar heads and one non-polar tail

Answer 1

Answer: (B)

Phospholipids molecules of plasma membrane are amphipathic, i.e., they have both hydrophilic and hydrophobic regions. This consists of one polar head (hydrophilic) and two non-polar (hydrophobic) tails of fatty acids.