Name the specific enzyme responsible for nucleotide polymerisation in DNA replication. Write characteristic features of this enzyme. Name the region on E. coli DNA where this enzyme can initiate replication.

Name the specific enzyme responsible for nucleotide polymerisation in

1.	Name the specific enzyme responsible for nucleotide polymerisation in DNA replication. Write characteristic features of this enzyme. Name the region on E. coli DNA where this enzyme can initiate replication.
Answer» DNA dependent DNA polymerase enzyme is responsible for polymerisation in DNA. Characteristic features of this enzyme: These enzymes are highly efficient as they catalyze polymerisation of a large no. of nucleotides in very short time in E. coli. High degree of accuracy : There is a definite region in E. coli DNA where the replication originates. Such regions are termed as origin of replication cori.

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(i) Arrange the following compounds in an increasing order of basic strength : `C_(6)H_(5)NH_(2), C_(6)H_(5)N(CN_(3))_(2), (C_(2)H_(5))_(2)NH and CH_(3)NH_(2)` (ii) Arrange the following compounds in a decreasing order of `pK_(b)` values: `C_(2)H_(5)NH_(2), C_(6)H_(5)NHCH_(3), (C_(2)H_(5))_(2) NH and C_(6)H_(5)NH_(2)`
Rerrange the following in an increasing order of their basic strengths: `C_(6)H_(5)NH_(2),C_(6)H_(5)N(CH_(3))_(2),(C_(6)H_(5))_(2)` NH and `CH_(3)NH_(2)`.
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Name the specific enzyme responsible for nucleotide polymerisation in DNA replication. Write characteristic features of this enzyme. Name the region on E. coli DNA where this enzyme can initiate replication.

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