NUTRITION
LIPIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following describes the function of cholesterol (a steroid) in the plasma membrane?
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Cholesterol is a polar compound that aids in transport of polar substance across the membrane.
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Cholesterol acts as a receptor molecule to bind to signaling molecules in the signal transduction pathway.
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Cholesterol provide energy for active transport across the plasma membrane.
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Cholesterol binds to the fatty acid tails to maintain fluidity of the membrane.
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Explanation:
Detailed explanation-1: -Aside from phospholipids, sterols and sterol-like compounds are ringed molecules that are found in biological membranes and help to regulate membrane fluidity, permeability, and rigidity. (27, 28) They also play important roles in membrane remodeling as part of biological processes such as endocytosis.
Detailed explanation-2: -Cholesterol influences the fluidity of the membrane, and it does so in a bidirectional manner; at high temperatures it decreases fluidity and at low temperatures it increases fluidity. At high temperatures, cholesterol’s flat, rigid structure limits phospholipid movement.
There is 1 question to complete.