NEET Biology question

Plasmids are suitable vectors for gene cloning because: [AIIMS 2007]

(A)These are small circular DNA molecules which can integrate with host chromosomal DNA
(B)These are small circular DNA molecules with their own origin of replication siteCorrect
(C)These can shuttle between prokaryotic and eukaryotic cells
(D)These often carry antibiotic resistance genes

Answer: (B)

Solution

Integration with the host chromosome is not a defining requirement of a vector, shuttling between cell types and carrying resistance genes are useful but secondary features,

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Question ID VK-125150