MDCAT Biology MCQ #952

A cell membrane consists primarily of phospholipids rather than simple triglycerides. What structural modification allows phospholipids to form bilayers?

MDCAT Biology MCQ #952

  1. Question 1

    Q1. A cell membrane consists primarily of phospholipids rather than simple triglycerides. What structural modification allows phospholipids to form bilayers?

    • A) The presence of three fatty acid chains
    • B) The lack of a glycerol backbone
    • C) The replacement of one fatty acid with a phosphate group
    • D) The total absence of ester linkages

    Answer: The replacement of one fatty acid with a phosphate group

    Explanation: Phospholipids have two fatty acids and a phosphate group. Triglycerides have three fatty acids attached to glycerol.