Which of the following is incorrect for the lysogenic cycle in life cycle of bacteriophage_____________?
Correct answer: C. Lysogenic bacteria may get infected by the related phage
- A. Phage when gets incorporated with the bacterial chromosome is called prophage
- B. The bacterium continues to live and reproduce normally
- C. Lysogenic bacteria may get infected by the related phage
- D. The cycle may convert into lytic type resulting from environmental exposure
Explanation
A lysogenic bacterium containing a prophage is generally immune to superinfection by the same or a closely related phage because prophage genes block reinfection. Therefore the statement that it may be infected by a related phage is incorrect; students may accept it by overlooking lysogenic immunity.
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About Viruses
Viruses are acellular infectious particles made of genetic material enclosed by a protein capsid, sometimes with a lipid envelope. Their replication depends on a host cell and may follow lytic or lysogenic cycles, so viral structure and reproduction differ fundamentally from those of cellular organisms such as bacteria.
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