A) chromosomal
B) extra-chromosomal
C) mitochondrial
D) none of these.
Correct Answer: B
Solution :
: Plasmid is a small, extrachromosomal, circular molecule of DNA that replicates independently of the host DNA. They are found in bacteria. They are divided into two classes: the large plasmids which include certain bacteriocinogens and the small plasmids which include those from 1.5 to\[15\mu m\]. in length. They are used as vectors in genetic engineering.
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