Question

Okazaki fragment of lagging strand, Exons of hnRNA are sealed by respectively​

Answer 1

Answer:

Sealed by DNA ligase

Explanation:

The sequence generated due to the lagging strand of DNA is called as  Okazaki fragments. When these are produced, they are in the form of pieces and hence they should be sealed toegther and that sealing is done by DNA ligase. One this joining is made, the fragments join together to form a continous strand.The sealing also catalysis the production of phosphodiester bond between the neighboring nucleotides

Answer 2

Answer:

Okazaki fragment of lagging strand, Exons of hnRNA are sealed by DNA ligase and spiciosome respectively.

Explanation:

Filling of the okazaki fragments are done by DNA polymerise 1st whereas ceiling of the okazaki fragments are done by DNA ligase.

Post transcriptional changes are required in eukaryotes where both intron and exons are present.

hnRna or heterogeneous RNA is modified into mRNA by snurp or spliceosome and further capping and tailing is done by adding AAA... sequences.