Insertion Sequences Are Prokaryotic Transposable Elements That Carry Only the Information

Multiple Choice

Insertion sequences are prokaryotic transposable elements that carry only the information needed for transposition. A composite transposon consists of two insertion sequences plus intervening DNA. Noncomposite transposons in bacteria lack insertion sequences but have terminal inverted repeats and carry information not related to transposition. All of these transposable elements generate flanking direct repeats at their points of insertion
-Which type of transposable element possesses terminal inverted repeats?

A) Insertion sequence
B) Composite transposons
C) Noncomposite transposon Tn3
D) All the above