Question

What is it important for DNA polymerase 1 to have three sites?

Short answer

DNA polymerase enzyme synthesis a new complementary strand of DNA by

Incorporating SNMP sequentially in the S¹ to 3¹ directions.

Step-by-step solution

DNA polymerase 1 

It is an enzyme that is responsible for forming new copies of DNA in the form of nucleic

acid molecules.

Three active sites of DNA polymerase

Polymerase 1provides three distinct catalyticactivities

3¹ to exonuclease,

S¹ to 3¹ exonucleases,

And S¹ to 3¹ polymerase activity.

Thus, DNA polymerase 1 needs to have three sites.