Identify the given structure:

(1) Adenylic acid

(2) Uracil

(3) Cholesterol

(4) Adenosine

Match the tissues/molecules mentioned in column I with those of their degrading enzymes mentioned in column II and select the correct option from the given codes.

            Column I                             Column II

A.  Cell wall                               (i)  Proteases

B. RNA                                      (ii) Pectinases

C. Histone                                 (iii) Ribonucleases

D. Pectin                                   (iv) Cellulase

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

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

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

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

Excess carbohydrates and proteins are stored in the body as

(1) amino acids                       

(2) fats

(3) starch                               

(4) monosaccharides

Nickel contributes to the formation of one of the following

(1) urease                               

(2) dehydrogenase

(3) rubisco protein                   

(4) nitrate reductase

Amino acid is a:

A. 

B.  

C. 

Which of the above is Zwitterionic form?

(1) B                    

(2) C                  

(3) A                  

(4) All are correct

The quaternary structure of a protein:

Adult human haemoglobin consists of:

1. 2 subunits (β, β)                           

2. 2 subunits (α, α)

3. 4 subunits (2α, 2β)                      

4. 3 subunits (2α, 1β)

Lecithin is:

(1) Phospholipid   

(2) Carbohydrate  

(3) Protein            

(4) Amino acid

The above diagram represent the nitrogenous bases. Identify the correct combination:

(1) A = Adenine; B = Thymine          

(2) A = Guanine; B = Thymine

(3) A = Adenine; B = Uracil               

(4) A = Guanine; B = Uracil