Question

question 14 of 25
which type of biomolecule is shown in the model?

a. a polypeptide chain
b. a nucleic acid chain
c. a strand of mrna
d. a carbohydrate

Explanation:

The model shows a chain of amino acids linked by peptide bonds (the -CO-NH- groups). A polypeptide chain is formed by amino acids joined through peptide bonds. Nucleic acid chains (like mRNA) have a sugar - phosphate backbone with nitrogenous bases. Carbohydrates have a different structure (e.g., multiple hydroxyl groups and a carbonyl group in a characteristic arrangement). Since the model has the structure of amino acids linked by peptide bonds, it is a polypeptide chain.

Answer:

A. A polypeptide chain