Question

Which of the following are the viral diseases?
(A) Malaria
(B) Cholera
(C) Hepatitis-B
(D) All of these

Answer 1

Hint: Virus is the small microscopic particle that can replicate only inside the host organisms. It infects all the organisms like animals, plants and the other microorganisms. They are harmful to the other organisms causing many diseases. These are smaller than the bacteria which ranges from 20-300nm.

Complete answer:
The disease caused by the virus is called viral disease. These virus organisms remain inactive outside the host organisms. When they enter into the host organisms, they replicate their identical copies in the body of the host organisms and cause the disease. The virus does not possess cells. Hence when they enter into the body of the host, they force the host cell to produce its identical copies rapidly. It makes use of the host mechanism and the metabolism for the process of replication. These organisms have the nucleic acid content in the center called virion and it is surrounded by the protein cover called capsid.

Malaria disease is caused by the protozoan Plasmodium and it is transmitted by the female anopheles’ mosquito. The cholera is the one of the bacterial diseases which is caused by the vibrio cholerae. The hepatitis-B is the only viral disease that is caused by hepatitis B. This virus affects the liver and the body fluid.

Hence the correct answer is OPTION(C)

Note: The common cold is the most common type of viral disease that is caused by infection of the virus in the upper respiratory tract. Chicken pox, influenza, AIDS, HIV, mumps, measles, rubella, hepatitis, shingles, meningitis, pneumonia etc. are some of the viral diseases.