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Question

The most useful plasmid for cloning is
  1. pBR 323
  2. pBR 222
  3. pBR 322
  4. pTM 223

A
pTM 223
B
pBR 323
C
pBR 222
D
pBR 322
Solution
Verified by Toppr

  • A cloning vector is a small piece of DNA, which carries the desired gene from one cell to another for cloning.
  • There are many types of cloning vectors, but the most commonly used ones are genetically engineered plasmids.
  • pBR322 is a plasmid and is one of the first widely used E. coli cloning vectors.
  • It was created in 1977 in the laboratory of Herbert Boyer at the University of California, San Francisco.

Hence, Option D is correct.

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