Question

Select true statement.
(a) Viruses are obligate parasite.
(b) Generally, plant viruses are single stranded RNA viruses.
(c) In addition to proteins, viruses also contain genetic material that could be either RNA or DNA.

• A. A
• B. B and C
• C. A and C
• D. A, B and C

Answer 1

The correct option is D A, B and C

Viruses are obligatory intracellular parasites as they are completely inactive outside the host. They have no metabolic machinery of their own and thus, uses the host's machinery to replicate.

Most plant viruses have single-stranded RNA of plus (+) sense type. There are only two classes of plant viruses that have DNA as their genetic material, the cauliflower mosaic virus and the geminivirus.

Viruses contain nucleic acid as their genetic material. They have either DNA or RNA which may be single stranded or double stranded and is associated with proteins.

So, the correct answer is D.