Biomolecules (Biology) · Question 1

Alpha-helix is found in which level of protein structure?

1. Secondary structure
2. Primary structure
3. Tertiary structure
4. Quaternary structure

Answer

(1) Secondary structure

Solution

The primary structure is only the amino acid sequence.

Folding of the chain into a regular right-handed -helix (held by H-bonds) is the secondary structure.

Answer: (1)