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Which statement(s) among A-D is/are not applicable to plasmids? A. They only replicate the same time as the larger chromosome. B. A plasmid may integrate into the chromosome. C. They may be of low or high copy number. D. Plasmids undergoing conjugation duplicate themselves by rolling circle replication.

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Answer:

A) They only replicate the same time as the larger chromosome.

Explanation:

  • Plasmids are small, circular, double stranded DNA molecule, which can replicate independently from its chromosomal DNA.
  • If plasmids are used for experiments, they are called vectors.
  • Scientists use plasmids as tools for cloning, transferring and manipulating genes.
  • They are distinct from chromosomes in being non-essential.
  • Plasmids are sometimes present in archaea and eukaryotic organisms.
  • Plasmids often carry genes that benefit the survival of the organism, such as by providing antibiotic resistance.
  • They do not replicate the same time as the larger chromosome.

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