Question

Match the structure of protein with its correct description.

Question 1 options:

1. Primary

1234
Single chain of amino acids
2. Secondary

1234
Alpha-helix and Beta-pleated sheets
3. Tertiary

1234
Three-dimensional structure of folding of alpha-helices and Beta-pleated sheets
4. Quaternary

1234
Three-dimensional subunits

Answer 1

The structures of proteins are divided into four levels: primary (amino acid sequence), secondary (alpha-helix and beta-pleated sheets), tertiary (folded 3D structure), and quaternary (arrangement of subunits). These structures are essential to a protein's function.

Step-by-step explanation:

The structure of a protein is critical to its function, and is described in four levels:

• Primary structure: This is the sequence of amino acids in the polypeptide chain.
• Secondary structure: This includes organized sections such as the alpha-helix and beta-pleated sheets, stabilized by hydrogen bonds.
• Tertiary structure: This is the overall folded 3D structure of the entire polypeptide chain, maintained by various interactions including hydrogen bonding and disulfide linkages.
• Quaternary structure: This describes the arrangement of multiple polypeptide subunits in a protein.

Applying this information, we can match each protein structure with its description:

1. Primary Structure: Single chain of amino acids.
2. Secondary Structure: Alpha-helix and Beta-pleated sheets.
3. Tertiary Structure: Three-dimensional structure of folding of alpha-helices and Beta-pleated sheets.
4. Quaternary Structure: Three-dimensional subunits.