$\mathrm{\alpha }$-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)  An, Cu

(3)  Cu, Cu

(4)  Zn, Zn

The structural feature which distinguishes proline from other natural a-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

Hormone that contains iodine is :

1. Insulin

2. Testosterone

3. Adrenaline

4. Thyroxine

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

Which of the following carbohydrate undergo mutarotation in aqueous solution?

(1)  Maltose

(2)  Lactose

(3)  Glucose

(4)  All of these

Sanger's reagent is used for the identification of

(1)  The N-terminal amino acid of a peptide chain

(2)  The c-terminal amino acid of a peptide chain

(3)  The sidechain of amino acids

(4)  Number of amino acid units