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What is the origin of replication in a vector?

Options

  1. AA sequence where replication starts
  2. BA sequence that controls the copy number of linked DNA
  3. CA sequence that helps in identifying and eliminating nontransformants
  4. DA sequence that helps in permitting the growth of transformants

Correct answer

A. A sequence where replication starts

Step-by-step solution

This is a sequence from where replication starts and any piece of DNA when linked to this sequence can be made to replicate within the host cells. This sequence is also responsible for controlling the copy number of the linked DNA. So, if one wants to recover many copies of the target DNA it should be cloned in a vector whose origin support high copy number

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