Sia
Question
Biology
Posted 10 months ago
Which of the following is NOT true regarding composite transposons of prokaryotes?
They create a target - site duplication when they insert into the host DNA
They have inverted terminal repeats
They often carry genes for antibiotic resistance
They transpose via a "copy - and - paste" mechanism
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Answer from Sia
Posted 10 months ago
B
Key Concept
Composite transposons transpose via a "cut-and-paste" mechanism, not "copy-and-paste".
Explanation
Composite transposons move by excising themselves from one location in the DNA and inserting into another location, which is characteristic of the "cut-and-paste" mechanism. The "copy-and-paste" mechanism is typical of retrotransposons, which use an RNA intermediate to duplicate themselves.
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