Identify the given structure:

(1) Adenylic acid

(2) Uracil

(3) Cholesterol

(4) Adenosine

Match Column - I with Column -II and select the correct option from codes given below.

          Column-I                               Column-II

A. Pigments                           (i) Abrin, ricin

B. Toxins                               (ii) Concanavalin A

C. Alkaloids                           (iii) Carotenoids

D. Lectins                              (iv) Morphine, codeine

(1) A-(iv), B-(iii), C-(i), D-(ii)

(2) A-(ii), B-(iv), C-(i), D-(iii)

(3) A-(iii), B-(i), C-(iv),D-(ii)

(4) A-(i), B-(ii), C-(iii), D-(iv)

Cholesterol is a precursor for each of the following except

(1) bile salts                 

(2) vitamin D

(3) insulin                     

(4) steroids

Which one of the following is an incorrect combination?

DNA and RNA comprise of 

(1) sugar, phosphate, base

(2) sugar, phosphate

(3) base, phosphate

(4) sugar, base

Which of the following options consist of non-essential amino acids only?

(1) Valine, leucine, glycine, alanine

(2) Glycine, serine, proline, glutamic acid

(3) Proline, aspartic acid, glutamic acid, methionine

(4) Cysteine, tyrosine, alanine, isoleucine

From the following groups, select the one which has only secondary metabolites?

(1) Arbin, cellulose, arginine, tyrosine

(2) Glycine, gums, serine, diterpenes

(3) Carotenoids, phenylalanine, curcumin, rubber

(4) Conclavin-A, morphine, codeine, vinblastine

In a normal adult, ascending order of concentration of following molecules is

(1) Si>Mg>Na>C             

(2) Na>K>Cu>Fe

(3) Fe>Na>K>Cu             

(4) Na>Fe>K>Cu

Which of the following is a homopolysaccharide?

Excess carbohydrates and proteins are stored in the body as

(1) amino acids                       

(2) fats

(3) starch                               

(4) monosaccharides