Chapter 13, Problem 1R

Why do we classify viruses as obligatory intracellular parasites?

Summary Introduction

To explain:

Why viruses are classified as obligatory intracellular parasites.

Introduction:

Viruses are small organisms which contain the DNA or RNA as its genetic materials. The genetic materials are composed of nucleic acid and proteins. It multiplies in all living cells, such as humans, animals, bacteria, and plants. Viroid and prion are diseases causing organisms that are composed of nucleic acids and proteins respectively.

Explanation of Solution

Viruses are considered as obligatory intracellular parasites because it multiplies by using synthesizing machinery of host cells to cause the synthesis of specialized elements that can transfer the viral genetic material and to other cells.

Conclusion

Viruses are obligate intracellular parasites that require living host cell for multiplication and metabolic activities.