Textbook Question
What characteristic of the light-producing regulatory circuit is consistent with the idea that it may be a regulon? What characteristic of this circuit stretches the definition for a regulon?
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16. Regulation of Expression
Prokaryotic Gene Regulation via Operons
Multiple Choice
Which gene transfer method involves the uptake of free DNA by competent bacterial cells?
A
Transformation
B
Binary fission
C
Conjugation
D
Transduction
Verified step by step guidance1
Understand the concept of gene transfer in bacteria, which is a process where genetic material is exchanged between bacterial cells, leading to genetic variation.
Identify the different methods of gene transfer: transformation, conjugation, and transduction. Each method has distinct mechanisms and involves different processes.
Transformation involves the uptake of free DNA from the environment by competent bacterial cells. Competence refers to the ability of a bacterial cell to take up extracellular DNA from its surroundings.
Conjugation is a method where genetic material is transferred between bacterial cells through direct contact, often involving a pilus. It typically requires a plasmid or other mobile genetic element.
Transduction involves the transfer of DNA from one bacterium to another via a bacteriophage, which is a virus that infects bacteria. This process does not involve free DNA uptake from the environment.
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