Which structure(s) of proteins remains(s) intact during denaturation process?

1. Both secondary and tertiary structures

2. Primary structure only

3. Secondary structure only

4. Tertiary structure only

The compound that does not reduce Benedict's solution is: 

If $\mathrm{\alpha }$—D—glucose is dissolved in water and kept for a few hours, the major constituent(s) present in the solution is/are:

The structural feature which distinguishes proline from other natural $\alpha$-amino acids is -

1. It is optically inactive.

2. It contains an aromatic group.

3. It is a dicarboxylic acid.

4. It is a secondary amine.

Insulin and carboxypeptidase contains respectively

1. Cu, Zn

2. Ag, Cu

3.  Cu, Cu

4.  Zn, Zn

$\mathrm{\alpha }$-helix is also known as

(1)  Sheet structure

(2)  Flat structure

(3)  3.613 helix

(4)  4.915 helix

The vitamin which causes impotency is

(1) Calciferol

(2) Biotin

(3) Tocopherol

(4) Retinol

Millon's test is given by that protein

1.  Which contain phenolic amino acids

2.  Which contain amino acid having S

3.  Which contain the basic amino acid

4.  Which contain the neutral amino acid

The ${\mathrm{pK}}_{{\mathrm{a}}_1}, {\mathrm{pK}}_{{\mathrm{a}}_2} \mathrm{and} {\mathrm{pk}}_{{\mathrm{a}}_3}$ of the dication of lysine $\begin{array}{c}\left({\mathrm{H}}_3\stackrel{+}{\mathrm{N}} - {\left({\mathrm{CH}}_2\right)}_4 - \mathrm{CH} - \mathrm{COOH}\right)\\ \begin{array}{c} |\\ +{\mathrm{NH}}_3\end{array}\end{array}$ are 2.18, 8.95 and 10.53 respectively. Calculate the pH of lysine at its isoelectric point.

1.  9.74

2.  7.22

3.  5.57

4.  6.36

Which of the following carbohydrates is not oxidized by bromine water?

1.  D - Galactose

2.  D - Glucose

3.  D - Fructose

4.  D - Mannose