Question

Below is a series of events involved in the mechanism of forming retrotransposons. Place them in the correct order.

1) The DNA is made double-stranded.
2) DNA of the transposable element is transcribed to RNA.
3) The DNA of the transposable element is integrated into a target DNA site.
4) The RNA is reverse transcribed by reverse transcriptase, producing a complementary DNA.

a) 1,2,3,4
b) 2,4,1,3
c) 4,2,1,3
d) 4,2,3,1
e) 3,2,4,1

Answer 1

The correct order of events in the mechanism of forming retrotransposons is 2, 4, 1, 3.

Step-by-step explanation:

The correct order of events in the mechanism of forming retrotransposons is b) 2,4,1,3.

1. The DNA of the transposable element is transcribed to RNA.
2. The RNA is reverse transcribed by reverse transcriptase, producing a complementary DNA.
3. The DNA is made double-stranded.
4. The DNA of the transposable element is integrated into a target DNA site.