Transposons can be primarily categorized into two types, DNA transposons and retrotransposons. Given below is some information regarding the above.
A. Eukaryotic DNA transposons excise themselves from one place in the genome and integrate into another site.
B. Retrotransposons are RNA sequences that are first reverse transcribed into cDNA and then integrate into the genome.
C. Retrotransposons move by a copy and paste mechanism through an RNA intermediate.
D. As DNA transposons move via a cut and paste mechanism, there can never be an increase in the copy number of a transposon.
Which of the statement(s) is/are true?
1
A and C
2
B and D
3
B only
4
D only