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Select the correct answer using the codes given below

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.(2013)

a) 1 only

b) 2 and 3 only

c) 1 and 3 only

d) 1, 2 and 3

Answer: A

  • Viruses have no metabolic enzymes and cannot generate their own energy. 
  • Viruses require a growth medium containing living cells therefore cannot be cultured in any synthetic medium. 
  • Viruses are transmitted from one organism to another not only by biological vectors but also by mechanical vectors. Mechanical vector like an arthropod vector which transmits an infectious organism from one host to another but it is not essential to the life cycle of the parasite.

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