MDCAT Biology MCQ #736

In an aqueous environment, phospholipids spontaneously arrange into a bilayer. What is the mechanism driving the specific orientation of the fatty acid tails?

MDCAT Biology MCQ #736

  1. Question 1

    Q1. In an aqueous environment, phospholipids spontaneously arrange into a bilayer. What is the mechanism driving the specific orientation of the fatty acid tails?

    • A) Heads facing inward, tails facing outward
    • B) Random orientation of molecules
    • C) Formation of a single hydrophobic layer
    • D) Tails facing inward, heads facing outward

    Answer: Tails facing inward, heads facing outward

    Explanation: Hydrophobic tails face inward to avoid water, while hydrophilic heads face the aqueous environment. A single layer would expose tails to water.