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Which option gives the most basic identity of the ligase enzyme?

Answer and explanation

Correct answer: DNA-joining enzyme

The most basic identity of DNA ligase is that it is an enzyme that joins DNA strands or fragments. It catalyses phosphodiester-bond formation between suitably aligned DNA ends, thereby sealing nicks and producing a continuous DNA backbone. Consequently, option A is correct and is the simplest reliable definition. Option B is a common confusion: DNA cutting is mainly associated with restriction endonucleases, not ligase. Option C refers to enzymes involved in carbohydrate breakdown, and option D is not an enzyme at all but a category describing a plant pigment such as chlorophyll. These distinctions make A the only scientifically appropriate answer.

Related tags

Basic IdentityDna Joining EnzymeLigaseLigase EnzymesPrinciples Of BiotechnologyBiotechnologyClass 11 Mcq

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