Question

Which of the following statements is/are correct?

1. Viruses lack enzymes necessary for the generation of energy.

2. Viruses can be cultured in any synthetic medium.

3. Viruses are transmitted from one organism to another by biological vectors only.

Select the correct answer using the codes given below. 

1. 1 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

Answer 1

Correct Answer - Option 1 : 1 only

The correct answer is 1 only.

• The virus is a small infectious particle that is made up of DNA or RNA.
• The virus is of different shapes and sizes. They reproduce by infecting host cells.
• Capsid made up of protein acts as a protective coat for viruses.

• Like Bacteria, viruses cannot be grown in a synthetic medium. They are grown in living cells.
• Viruses are transmitted from one organism to another by both biological vectors such as mosquitoes and mechanical vectors such as flies.
• Viruses cannot generate their own energy as they lack metabolic enzymes.