Which of the following carbohydrate undergo mutarotation in aqueous solution?

(1)  Maltose

(2)  Lactose

(3)  Glucose

(4)  All of these

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

1.  D - Galactose

2.  D - Glucose

3.  D - Fructose

4.  D - Mannose

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

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 vitamin which causes impotency is

(1) Calciferol

(2) Biotin

(3) Tocopherol

(4) Retinol

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

1.  Sheet structure

2.  Flat structure

3.  3.613 helix

4.  4.915 helix

Insulin and carboxypeptidase contains respectively

1. Cu, Zn

2. Ag, Cu

3.  Cu, Cu

4.  Zn, Zn

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.

Glucose and Mannose are

1. C₁ epimers

2. Anomers

3. C₂ epimers

4. C₄ epimers

Which of the following is the correct statement?