Question

during splicing the exons are joined and the enzyme which catalyzes this reaction is ​

Answer 1

Answer:

Explanation:

During splicing, introns are removed and exons are joined together. For nuclear-encoded genes, splicing takes place within the nucleus either during or immediately after transcription.

Answer 2

During splicing the exons are joined and the enzyme which catalyzes this reaction is RNA ligase.

Explanation:  

• The DNA consists of the intron and the exons. The introns are those part of the chain which does not code for only protein. So they are removed.  

• First an RNA transcript is made by using RNA primase. This produces a complementary part of the DNA. Then the complementary parts of the RNA are joined using RNA ligase.  

• The enzyme joins the two intron RNA sequence. Hence a segment is produced without the exons. This is the splicing and joining of the exons.