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Multiple Choice
A prophage is:
A
Viral DNA that has been incorporated into the bacterium's DNA.
B
A phage carrying bacterial DNA.
C
Donor DNA that has been incorporated into the recipient's DNA.
D
A phage carrying bacterial and viral DNA.
Verified step by step guidance
1
Understand the term 'prophage': A prophage is a form of viral DNA that integrates into the bacterial genome. It is a stage in the life cycle of certain bacteriophages, specifically temperate phages.
Recognize the process of lysogeny: In lysogeny, the viral DNA becomes part of the host bacterium's DNA, allowing the virus to be replicated along with the host cell's DNA without causing immediate lysis.
Differentiate between the options: The key characteristic of a prophage is its integration into the bacterial DNA, which distinguishes it from other forms of phage DNA interactions.
Identify the correct description: The correct answer is 'Viral DNA that has been incorporated into the bacterium's DNA,' as this describes the prophage's integration into the host genome.
Clarify misconceptions: A phage carrying bacterial DNA or a phage carrying bacterial and viral DNA refers to transduction processes, not the prophage state. Donor DNA incorporated into recipient DNA is related to bacterial conjugation or transformation, not prophage formation.