Question

Choose the wrong answer.

(a) The A base saves the 5’-P of the intron by forming bond which saves requirement of ATP

(b) The 5’-P attacks the 3’-OH of the intron

(c) In self splicing group I G base makes this lariet structure

(d) Group II self-splicing RNA splices better when proteins are added

This question was posed to me in unit test.

I would like to ask this question from Post-Transcriptional Modification in chapter Gene Expression : Transcription Prokaryotes of Cytogenetics

Answer 1

The correct answer is (c) In self splicing group I G base makes this lariet structure

To elaborate: The G base attacking the 5’ end of the intron doesn’t form a bond with the 2’OH but with the 3’-OH end. Thus, in place of a leriet like structure a linear structure is seen.