SCIENCE
VIRUS AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A large number of phages are released at a time
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The virus-host relationship usually lasts for generations
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Viral DNA is incorporated into the host genome
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The viral genome replicates without destroying the host
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Detailed explanation-1: -The answer is C) A large number of phages are released at a time.
Detailed explanation-2: -Which of the following is characteristic of the lytic cycle? Viral DNA is incorporated into the host genome.
Detailed explanation-3: -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.
Detailed explanation-4: -From 50 to 200 bacteriophages may be produced per infected bacterium. Adsorption of a Bacteriophage to the Cell Wall of the Bacterium. Attachment sites on the virus bind to corresponding receptors on the host cell wall.
Detailed explanation-5: -In the lytic cycle, the phage replicates and lyses the host cell. In the lysogenic cycle, phage DNA is incorporated into the host genome, where it is passed on to subsequent generations. Environmental stressors such as starvation or exposure to toxic chemicals may cause the prophage to excise and enter the lytic cycle.