MDCAT Biology MCQ #975

Water acts as a temperature stabilizer in the cytoplasm. What mechanism allows it to absorb significant heat without a large temperature rise?

MDCAT Biology MCQ #975

  1. Question 1

    Q1. Water acts as a temperature stabilizer in the cytoplasm. What mechanism allows it to absorb significant heat without a large temperature rise?

    • A) Absorption of heat by forming new covalent bonds
    • B) Absorption of heat to break existing hydrogen bonds
    • C) Release of heat during the formation of ice crystals
    • D) Movement of water molecules via capillary action

    Answer: Absorption of heat to break existing hydrogen bonds

    Explanation: High specific heat means water absorbs much heat with little temperature change because energy is used to break hydrogen bonds.