Question

'Polio' is caused by

• A. A bacteriophage
• B. A virus with single strand RNA
• C. A virus with single strand DNA
• D. A virus with double strand DNA

Answer 1

The correct option is B A virus with single strand RNA

Polio is an infectious disease caused by poliovirus. The virus colonises in the gastrointestinal tract. poliovirus is composed of an RNA genome and a protein capsid. The genome is a single-stranded positive-sense RNA genome that is about 7500 nucleotides long. It mainly affects motor neurons within the spinal cord, brain stem, or motor cortex and causes muscle paralysis.

So, the correct answer is option B.