Match column I (enzymes) with column II (function) for E.coli
Column I Column II
a. Topoisomerase 1. Synthesizes DNA
b. DNA polymerase III 2. Releases torque or strain
c. DNA polymerase I 3. Joins Okazaki fragments by removing RNA primer.
d. DNA ligase 4. Joins two DNA fragments.

a - 1, b - 2, c - 3, d - 4

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a -2, b - 1, c - 3, d -4

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a -3, b -4, c - 1, d - 2

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a -4, b - 3, c -2, d -1

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Solution

The correct option is C a -2, b - 1, c - 3, d -4
Topoisomerase enzyme release strain in the highly coiled DNA strands as the replication fork moves forward. DNA polymerase III synthesizes DNA on the template strand. DNA polymerase I joins Okazaki fragments of the lagging strand by deleting or removing RNA primer. DNA ligase joins two broken/separated ends of DNA.
So, the correct answer is a - ii, b - i, c - iii, d - iv

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Q. Match the following

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Q. Match List I(Enzyme) with List II(Function) and select the correct answer using the codes given the lists.

List-I	List-II
a. DNA Ligase	$1$ . Catalyses the covalent union of segments of an interrupted sugarphosphate strand in double-stranded DNA
b. DNA polymerase	$2$ . End nuclease that digests either single stranded or double stranded DNA
c. DNase I	$3$ . Produces single or double stranded breaks in DNA during replication to release tension brought about by the separation of double strands
d. DNA topoisomerase	$4$ . Catalyses the formation of DNA worn deoxyribonucleotides using one strand of DNA as template

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	Column I		Column II
a.	Topoisomerase	1.	Synthesizes DNA
b.	DNA polymerase III	2.	Releases torque or strain
c.	DNA polymerase I	3.	Joins Okazaki fragments by removing RNA primer.
d.	DNA ligase	4.	Joins two DNA fragments.

Match column I (enzymes) with column II (function) for E.coliColumn IColumn IIa.Topoisomerase 1.Synthesizes DNAb.DNA polymerase III2.Releases torque or strainc.DNA polymerase I 3.Joins Okazaki fragments by removing RNA primer.d.DNA ligase 4.Joins two DNA fragments.

Match column I (enzymes) with column II (function) for E.coli
Column I Column II
a. Topoisomerase 1. Synthesizes DNA
b. DNA polymerase III 2. Releases torque or strain
c. DNA polymerase I 3. Joins Okazaki fragments by removing RNA primer.
d. DNA ligase 4. Joins two DNA fragments.