Chapter 18.2, Problem 1NV

Summary Introduction

To fill:

The correct term accordingly in the given blanks.

Answer to Problem 1NV

The given blanks can be filled as follows:

S. no.	Correct term
1	Virus
2	Capsid
3	Lytic
4	Lysogenic
5	Retrovirus
6	Prion

Explanation of Solution

The viruses are the small pathogen having nucleic acids and a protein capsule around it. The virus reproduces in the cell of the host and they use the resource of the host cells. There are two cycles through which viruses replicate.

The lysogenic cycle and lytic cycle are the two types of viral replication. The lytic cycle uses the host’s machinery and makes more viruses inside the cell, when the number of viruses is sufficient, they burst out of the cells. In the lysogenic cycle, incorporation of the viral genome into the genome of the host occurs that infects the cell from within and remains dormant for some time there. The retroviruses are the viruses having RNA as a genome.

The prions are misfolded proteins that cause diseases. The change in the configuration of protein may arise due to any change in the DNA sequence or gene expression.