Multiple Choice
Amino acids are linked together by peptide bonds to form a:
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4. Protein Structure
Peptide Bond
Multiple Choice
In the context of peptide bonds, what is a polypeptide?
A
A nucleic acid strand made of nucleotides linked by phosphodiester bonds
B
A carbohydrate polymer composed of monosaccharides linked by glycosidic bonds
C
A lipid made of fatty acids esterified to glycerol
D
A polymer made of many amino acids linked together by peptide bonds
Verified step by step guidance1
Understand the definition of a polypeptide: it is a polymer composed of amino acids linked together by peptide bonds.
Recall that peptide bonds are covalent bonds formed between the carboxyl group of one amino acid and the amino group of another, releasing a molecule of water (a condensation reaction).
Recognize that polypeptides are the primary structure of proteins, serving as chains that fold into functional three-dimensional structures.
Differentiate polypeptides from other biological polymers: nucleic acids are made of nucleotides linked by phosphodiester bonds, carbohydrates are polymers of monosaccharides linked by glycosidic bonds, and lipids are composed of fatty acids esterified to glycerol.
Conclude that the correct description of a polypeptide is a polymer made of many amino acids linked together by peptide bonds.
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