alleryStart learning →Cholesterol sits alongside the phospholipids in the membrane core. What is its structure?
AA glycerol backbone with two fatty acids
BA branched chain of monosaccharide units
CA lipid composed of four fused carbon rings
DA folded chain of twenty amino acids
Answer & Solution
Correct answer: C. A lipid composed of four fused carbon rings
1. Cholesterol is a lipid composed of four fused carbon rings.
2. It is found alongside the phospholipids in the core of the membrane.
3. A glycerol backbone carrying two fatty acids describes a phospholipid instead.
4. Chains of monosaccharides and chains of amino acids describe membrane carbohydrates and membrane proteins.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 5 "Structure and Function of Plasma Membranes", section 5.1 Components and Structure_
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