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Bacterial sRNAs can bind to mRNAs through complementary binding to regulate gene expression. What determines whether the sRNA/mRNA binding will promote or repress mRNA translation?
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12. Gene Regulation in Prokaryotes
Lambda Bacteriophage and Life Cycle Regulation
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In which of the following life cycles does a bacteriophage integrate itself into the host genome?
A
Lysogenic cycle
B
Integrative cycle
C
Lytic cycle
D
Subdue cycle
Verified step by step guidance1
Understand the life cycles of a bacteriophage: Bacteriophages can undergo two main types of life cycles: the lytic cycle and the lysogenic cycle.
In the lytic cycle, the bacteriophage takes over the host cell's machinery to replicate its own genetic material, eventually causing the host cell to burst (lyse), releasing new phage particles.
In the lysogenic cycle, the bacteriophage integrates its genetic material into the host cell's genome, becoming a prophage. This integrated state allows the phage DNA to be replicated along with the host cell's DNA without destroying the host.
Recognize that the term 'integrate' is key to identifying the lysogenic cycle, as this is the cycle where integration into the host genome occurs.
Eliminate the other options: The 'Integrative cycle' is not a standard term in bacteriophage life cycles, and the 'Subdue cycle' is not a recognized cycle. The lytic cycle does not involve integration into the host genome.
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