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What happens if vector and insert ends are not compatible?

Answer and explanation

Correct answer: Ligation may be difficult

Successful ligation requires vector and insert ends that can align appropriately and present compatible chemical termini. With compatible sticky ends, complementary bases can pair, bringing the DNA fragments together so DNA ligase can seal the remaining phosphodiester backbone interruptions. If the ends are not compatible, this alignment and joining become inefficient or may fail, so option A is correct. The fragments may need to be re-cut with a suitable restriction enzyme, blunted and repaired, or joined by another cloning strategy. Non-compatible ends do not make ligation automatically perfect, and they cannot transform DNA into chlorophyll or water. The key concept is compatibility of DNA ends before ligase-mediated joining.

Related tags

Compatible EndsLigationVector-Insert JoiningDna LigaseProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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