1.

State the role of any four enzymes involved in the process of DNA replication.

Answer»

Enzymes taking part in Replication 

Four different enzymes have been reported which are given below : 

Exonuclease : This enzyme breaks down the hydrogen bonds coupling nitrogenous bases in DNA molecules so that both the chains get apart during replication.

Endonuclease: This enzyme breaks down the chain or chains of DNA molecule. Whenever it appears, it results in dispersive type of replication. 

Polymerase or replicase enzyme: It catalyses the formation of one polynucleotide chain that is a copy of another (complementary chain). This new chain is synthesized from the raw material already present in nucleoplasm. 

Ligase: This enzyme is used in the formation of bonds between the nitrogenous bases such as A = T and C = G. Whenever the appearance of the enzyme is delayed, conservative type of replication results.



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