Question

2.1.2 quiz: protein synthesis

question 1 of 10
how does a proteins shape relate to its amino acids?
a. a proteins shape depends on whether it is made up of amino acids or nucleotides.
b. proteins are made up of only one kind of amino acid, but each proteins shape depends on how many amino acids it has.
c. proteins always have the same amino acid sequence but can fold into a variety of shapes.
d. a proteins shape is determined by how amino acid side chains interact.

Explanation:

Proteins are made of amino acids. The side chains (R - groups) of amino acids can form various interactions (e.g., hydrogen bonds, hydrophobic interactions, disulfide bridges). These interactions dictate how the protein folds, which ultimately determines its shape.

• Option A is incorrect because proteins are made of amino acids (not nucleotides). Nucleotides are the building blocks of nucleic acids (like DNA and RNA).
• Option B is incorrect as proteins are made of 20 different amino acids (not just one kind).
• Option C is incorrect because different proteins have different amino - acid sequences.

Answer:

D. A protein’s shape is determined by how amino acid side chains interact.