Multiple choice

Which of the following statements is not correct?

  1. Plasmids are circular pieces of double stranded DNA that exist separately from chromosomal DNA.

  2. Plasmids that can be propagated in cells of two or more different species are called expression vectors.

  3. Shuttle vectors can be used in both eukaryotes and prokaryotes.

  4. A cloning vector is a small piece of DNA into which a foreign DNA fragment can be inserted for cloning purposes.

  5. Replacement vector is a cloning vector in which part of the normal genome is replaced by foreign DNA.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plasmids that can be propagated in cells of two or more different species are called shuttle vectors. An expression vector is generally a plasmid that is used to introduce a specific gene into a target cell.

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