Which of the Following Statements is True About Tn3 Elements

Question

Which of the following statements is true about Tn3 elements?
A) Tn3 form a cointegrate structure mediated by the tnpA gene product.
B) The cointegrate structure is required for replication.
C) Transposition is repressed by the dual nature of the tnpA gene product.
D) Tn3 elements are highly mobile.
E) All of these

Accepted Answer

Tn3 elements form a cointegrate structure mediated by the tnpA gene product. However, this structure is not required for replication or highly mobile transposition. The dual nature of the tnpA gene product allows for activation and inhibition of transposition.