The double helix model of DNA was proposed by

1.	Berzelius	2.	Watson and Crick
3.	Griffith	4.	Robert Brown

The pitch of the B-DNA is

1. 36 A

2. 3.4 A

3. 34 A

4. 3.6 A

In DNA, cytosine pairs with

Which of the following are basic amino acids?

In B-DNA, one full turn of the helical strand contains

In which of the following energy is released?

Which of the following is not strictly a biomacromoles?

1. Proteins

2. Lipids

3. Polysaccharides

4. Nucleic acid

A secondary metabolite that acts as a toxin is

1. Carotenoids

2. Curcumin

3. Abrin

4. Monoterpenes

A secondary metabolite that is alkaloid in nature is

1. codeine

2. Anthocyanin

3. Gum

4. Abrin

An example of protein with quaternary structure is

1. Myoglobin

2. Haemoglobin

3. Keratin

4. All of these