Chapter 9, Problem 4RQ

Summary Introduction

A small infectious agent that could live and replicate only inside the cell of a living organism is referred to as a virus. The viruses could infect all types of life forms such as plant, animals, and microorganisms. The virus has the genome of either RNA or DNA and is referred to as RNA virus or DNA virus respectively. Most of the viruses contain the single-stranded genome of RNA of the plus sense and are referred to as positive-strand RNA viruses.