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Which statement best describes how cholesterol affects cell membrane fluidity?
  • a)
    Cholesterol increases fluidity at high temperatures and decreases fluidity at low temperatures.
  • b)
    Cholesterol increases fluidity at high temperatures and increases fluidity at low temperatures.
  • c)
    Cholesterol decreases fluidity at high temperatures and decreases fluidity at low temperatures.
  • d)
    Cholesterol decreases fluidity at high temperatures and increases fluidity at low temperatures.
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Which statement best describes how cholesterol affects cell membrane f...
Cholesterol plays a crucial role in modulating the fluidity of the cell membrane. At high temperatures, cholesterol acts as a stabilizing agent by restraining the movement of phospholipids and reducing membrane fluidity. It prevents the phospholipid molecules from packing too closely together, thereby maintaining the integrity and stability of the membrane. This is important because high temperatures can cause the phospholipids to become more fluid and disorganized.
On the other hand, at low temperatures, cholesterol acts as a fluidity buffer by preventing the phospholipid molecules from packing too tightly. It inserts itself between the phospholipids and increases the space between them, allowing for more movement and flexibility in the membrane. This helps to maintain membrane fluidity and prevents the membrane from becoming overly rigid and potentially losing its functionality.
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Which statement best describes how cholesterol affects cell membrane fluidity?a)Cholesterol increases fluidity at high temperatures and decreases fluidity at low temperatures.b)Cholesterol increases fluidity at high temperatures and increases fluidity at low temperatures.c)Cholesterol decreases fluidity at high temperatures and decreases fluidity at low temperatures.d)Cholesterol decreases fluidity at high temperatures and increases fluidity at low temperatures.Correct answer is option 'D'. Can you explain this answer? for MCAT 2025 is part of MCAT preparation. The Question and answers have been prepared according to the MCAT exam syllabus. Information about Which statement best describes how cholesterol affects cell membrane fluidity?a)Cholesterol increases fluidity at high temperatures and decreases fluidity at low temperatures.b)Cholesterol increases fluidity at high temperatures and increases fluidity at low temperatures.c)Cholesterol decreases fluidity at high temperatures and decreases fluidity at low temperatures.d)Cholesterol decreases fluidity at high temperatures and increases fluidity at low temperatures.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for MCAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which statement best describes how cholesterol affects cell membrane fluidity?a)Cholesterol increases fluidity at high temperatures and decreases fluidity at low temperatures.b)Cholesterol increases fluidity at high temperatures and increases fluidity at low temperatures.c)Cholesterol decreases fluidity at high temperatures and decreases fluidity at low temperatures.d)Cholesterol decreases fluidity at high temperatures and increases fluidity at low temperatures.Correct answer is option 'D'. Can you explain this answer?.
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