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Which step comes after restriction digestion before transformation?

Answer and explanation

Correct answer: Ligation or recombinant DNA formation

The direct answer is A: ligation or recombinant DNA formation. Restriction digestion first cuts the vector and insert DNA at selected sites. The resulting compatible DNA ends are then joined by DNA ligase, forming recombinant DNA. Only after this construction is the recombinant molecule introduced into a host by transformation. Option A is correct because it is the logical laboratory step between cutting and transformation. Option B, photosynthesis, makes sugars in plants and is unrelated to DNA joining. Option C, transpiration, is water loss from plant surfaces and has no role here. Option D, protein digestion only, does not join DNA fragments and cannot create a recombinant plasmid. The correct sequence cue is: cut, join, introduce, select.

Related tags

LigationRecombinant DnaTransformation

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