Quaternary Structure of Proteins

Q. In alanylglycylleucylalanyvaline, the number of peptide linkages is

Q. How many of the given compounds will give a positive Biuret test ?
$\text{Glycine, Glycylalanine, Tripeptide, Biuret}$.

Q. The structure of protein that is unaffected by heating is

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

Q. During the denaturation of proteins, which of these structures will remain intact?

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

Q. Stability of $\alpha$-Helix structure of proteins depends upon

1. van der Waals forces
2. H-bonding interaction
3. $\pi$ -stacking interaction
4. dipolar interaction

Q. In a linear tetrapeptide (Constituted with different amino acids), (number of amino acids)-(number of peptide bonds) is

Q. Alanylglycylphenylalanine is an example of a ______

1. dipeptide
2. tripeptide
3. tetrapeptide
4. polypeptide