Question

Write about the bacteriophages? (7-8 lines)

Answer 1

A bacteriophhase is a virus that infects and replicates within a bacterium. they are composed of proteins that encapsulates RNA or DNA genome and may have relatively simple or elaborate structures .

Answer 2

Answer: 1)- Bacteriophage, also called phage or bacterial virus, any of a group of viruses that infect bacteria.

2)- Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Félix d’Hérelle in France (1917).

3)- Some phages can only reproduce via a lytic lifecycle, in which they burst and kill their host cells.

4)- The steps that make up the infection process are collectively called the lifecycle of the phage.

5)- In the lytic cycle, a phage acts like a typical virus: it hijacks its host cell and uses the cell's resources to make lots of new phages, causing the cell to lyse (burst) and die in the process.

6)- The lysogenic cycle allows a phage to reproduce without killing its host.

7)- In the lysogenic cycle, the first two steps (attachment and DNA injection) occur just as they do for the lytic cycle.

8)- Bacteriophages are among the most common and diverse entities in the biosphere.

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