Question

Read the following statements and find out the incorrect one.

• A. Virus takes over the machinery of the host cell to replicate themself.
• B. Virus contains both RNA and DNA.
• C. AIDS in human is caused by a virus.
• D. Generally in plant viruses, ss RNA is present.

Answer 1

Answer: (B)

Virus contains both RNA and DNA.

A) The viruses are non-cellular organisms that are characterized by having an inert crystalline structure outside the living cell. Once they infect a cell they take over the machinery of the host cell to replicate themselves and kill the host.

B) A virus does not contain both RNA and DNA either they contain DNA as genetic material or RNA as genetic material.

C) AIDS is acquired immunodeficiency syndrome is an infection caused by the virus name HIV(human immunodeficiency virus). HIV is a retrovirus which use to attack on macrophages and T cells and uses their machinery to replicate which leads to destroying the host cells.

D) Generally, the viruses that infect plants have single-stranded RNA.

So the correct answer is 'Virus contains both RNA and DNA.'.