Q43.
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.
Answer
A
Explanation
Option 1 is correct: viruses do not have the chemical machinery needed to survive on their own. Option 2 is wrong: viruses can only grow inside living host cells and cannot be cultured on synthetic media. Option 3 is also wrong: viruses enter the body from the environment or other individuals through soil, water to air, via nose, mouth, or breaks in the skin — not only via biological vectors.