Question

Select the correct sequence of stages of the lytic cycle: a. release, maturation, biosynthesis, penetration, adsorption b. adsorption, penetration, biosynthesis, maturation, release c. penetration, release, adsorption, biosynthesis, maturation d. release, penetration, adsorption, biosynthesis, maturation e. biosynthesis, adsorption, penetration, maturation, release

Answer 1

Answer:

adsorption, penetration, biosynthesis, maturation, release

Explanation:

The virus after infecting the cell produces several progenies which after reaching a certain number cause the lysis of the cell and are then released out from it. This process of entering the host by the virus and then lysing the cells to be released is termed as a lytic cycle.

There are 5 stages involved in this lytic cycle:

1. Adsorption - when the virus finds its attachment site on the bacteria it gets attached to the viral receptor and then is adsorbed on the bacteria, this is the first step required to gain entry into the host.

2. Penetration - once the virus is attached to the host the next step is to penetrate it and enter inside the cell. For this, the virus secretes lysozyme and then inserts its genetic material inside the cell.

3. Biosynthesis - this stage involves the utilization of the enzymes and nucleotides of the host to make up the DNA of the phage.

4. Maturation - once the phage DNA is made the next stage is to assemble the phage DNA with the capsid and this is termed as maturation.

5. Release - this step involves the breakage of the plasma membrane of the host cell and the release fo the phage particles.

Answer 2

Answer:

The correct answer will be option-B

Explanation:

The lytic cycle is the reproductive cycle used by the bacteriophage to replicate or reproduce itself by killing the host cell and using its replication machinery.

The process takes place in five main stages:  

1. Attachment (Adsorption): The bacteriophage gets attached to the surface of the host cell.

2. Penetration: The phage penetrates the head containing the genetic material into the host.

3. Biosynthesis: The genetic material gets incorporated into the bacterial genome and the viral genome gets replicated.

4. Maturation: The gene products form the viral components and get assembles inside the host.

5. Release: The virus gets released by rupturing the cell wall of the host.

Thus, Option-B is the correct answer.