Q 1 :    

 Match List-I with List-II.

  List-I (Biological molecules):   List-II (Biological functions):
A Glycogen (i) Hormone
B Globulin (ii) Biocatalyst
C Steroids (iii) Antibody
D Thrombin (iv) Storage product

Choose the correct answer from the options given below: 

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

     

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

     

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

     

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

     

Enter Answer here

 



Q 2 :    

Which one of the following statements is wrong?

  • Uracil is a pyrimidine.

     

  • Glycine is a sulphur-containing amino acid.

     

  • Sucrose is a disaccharide.

     

  • Cellulose is a polysaccharide.

     

Glycine is a neutral amino acid. Cysteine and methionine are sulphur containing amino acid.

 



Q 3 :    

The chitinous exoskeleton of arthropods is formed by the polymerisation of

  • N-acetyl glucosamine

     

  • lipoglycans

     

  • keratin sulphate and chondroitin sulphate

     

  • D - glucosamine.

     

Chitin is a structural polysaccharide that constitutes the exoskeleton of arthropods. It is a complex carbohydrate in which N-acetyl glucosamine monomers are joined together by (1, 4) β-linkages. Chitinous exoskeleton provides strength and elasticity to arthropods.

 



Q 4 :    

Which one of the following is a non reducing carbohydrate?

  • Maltose

     

  • Sucrose

     

  • Lactose

     

  • Ribose 5-phosphate

     

In non-reducing sugars, a free aldehyde or ketonic group is absent. Sucrose is a non-reducing sugar formed by condensation of one molecule each of glucose and fructose with release of a water molecule. A glycosidic bond is established between carbon atom 1 of glucose and carbon atom 2 of fructose.