NEET · Biology · Protein Structure Levels

Exercise and reference answers

Matching pairs

1. A

   Primary

   B

   Linear amino-acid sequence

2. A

   Secondary

   B

   α-helix and β-pleated sheet folding

3. A

   Tertiary

   B

   3-D shape of a single chain

4. A

   Quaternary

   B

   Multiple chains assembled (e.g. haemoglobin)

5. A

   Peptide bond

   B

   C-N bond between adjacent amino acids

6. A

   Denaturation

   B

   Loss of higher structure with heat or pH

Instructions

Match each level of protein structure to its definition.