A triglyceride consists of:
a. Glycerol plus three fatty acids
b. A sugar-phosphate backbone to which two amino groups are attached
c. Two to several hexoses
d. Amino acids that have been thoroughly saturated with hydrogen

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Understand the structure of a triglyceride: it is a type of lipid molecule commonly found in fats and oils.

Recall that a triglyceride is composed of one glycerol molecule bonded to three fatty acid chains.

Recognize that option (a) describes this structure correctly: glycerol plus three fatty acids.

Eliminate other options by identifying their descriptions: (b) describes a nucleotide or nucleic acid component, (c) refers to sugars or polysaccharides, and (d) refers to amino acids, which are protein building blocks, not triglycerides.

Conclude that the correct description of a triglyceride is option (a).

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Structure of Triglycerides

Triglycerides are lipids composed of one glycerol molecule bonded to three fatty acid chains. This structure serves as a major form of energy storage in organisms and is a key component of fats and oils.

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03:48

Triglycerides

Glycerol Molecule

Glycerol is a three-carbon alcohol with hydroxyl groups that serve as attachment points for fatty acids in triglycerides. It forms the backbone that links the fatty acids through ester bonds.

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7:17

Classes of MHC Molecules

Fatty Acids

Fatty acids are long hydrocarbon chains with a carboxyl group at one end. They can be saturated or unsaturated and are esterified to glycerol in triglycerides, influencing the physical properties of fats.

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