Which enzyme is capable of cutting open a circular plasmid DNA molecule?

Biology Mcqs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Biology Mcqsbiology-mcqs
Published
11 May 2018
Last updated
28 May 2026

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Explanation

The ligase enzyme is responsible for joining DNA strands together and can also break open the circular structure of a plasmid. Primase synthesizes RNA primers, restriction endonucleases cut DNA at specific sequences but do not open plasmid rings in the same manner, and ATPase enzymes hydrolyze ATP for energy.

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