Question

question 10
the tertiary structure of a polypeptide is the ...
linear sequence of amino acids in a polypeptide.
localized region of a polypeptide chain that forms a α helix or β pleated sheet.
overall three - dimensional shape of a fully folded polypeptide.
overal three - dimensional shape of a protein composed of more than one polypeptide.

Explanation:

1. Analyze each option:

• The first option describes the primary structure (linear amino acid sequence).
• The second option describes the secondary structure (α - helix or β - pleated sheet).
• The third option: The tertiary structure of a polypeptide is defined as the overall three - dimensional shape of a fully folded polypeptide chain, which is formed by interactions like hydrophobic interactions, disulfide bridges, etc.
• The fourth option (with a typo "overal") describes the quaternary structure (structure of a protein with multiple polypeptides).

Answer:

C. overall three - dimensional shape of a fully folded polypeptide.