Both the strands of the DNA are joined by

1.Disulphide bond

2.Hydrogen bonds

3.Glycosidic bonds

4.phosphodiester bonds

Which of the following is the pitch of B-DNA

1.34Angstrom

2.34 nanometre

3.34 picometre

4.34 femtometre

Which model explains the double helix nature of DNA

1.Watson and Crick Model

2.Gene Battery Model

3.Sanger Sequencing

4.Both 1 and 3

Which of the following is the most abundant protein in the whole of the biosphere?

1.Collagen

2.Albumin

3.RUBISCO

4.Antibody

Which of the following is present as a store house of energy in plant tissues?

1.Cellulose

2.Sucrose

3.Glycogen

4.Starch

Which of the following is present as a store house of energy in animal tissues?

1.Cellulose

2.Sucrose

3.Glycogen

4.Starch

Starch gives blue colour because of

1.It exists in globular form

2.I₂ gets hold in helical form

3.It has blue colour pigment

4.All of the above

Which of the following is not true about cellulose?

1.It cannot be digested by humans

2.It’s a polymer of β, D Glucose

3.It’s a branched polymer

4.It does not give blue colour with Iodine

Proteins are ______ of amino acids

1.homopolymer

2.heteropolymer

3.Neither homopolymer nor heteropolymer

4.None of these

Which of the following is responsible for the formation of primary polypeptide?

1.peptide bond

2.Hydrogen bonding

3.Di-sulphide bond

4.Ionic bond