A) plasmids and bacteriophages
B) plastids and plasmids
C) plastids and bacteriophages
D) plasmids and phasmids.
Correct Answer: C
Solution :
: Plasmids are extrachromosomal circular DNA molecule found in bacteria. Bacteriophages (virus infecting bacteria) are the viruses having a head which contain nucleic acid and a cylindrical tail consisting of a core and a sheath. Genetic engineering experiment utilize plasmids and bacteriophages as the tools for manipulating the genetic material. Plasmids are widely used as carriers of cloned genes. When plasmids are used as cloning vectors and carry a noval DNA sequence they are referred to as chimaeric plasmids. The plasmid and foreign DNA molecules are sliced with the help of restriction endonuclease enzyme.
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