THE MOLECULAR BASIS OF INHERITANCE
RECOMBINANT DNA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A section of DNA
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Circular DNA found in bacteria
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DNA that has genes from different organisms
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A bundle of DNA
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Detailed explanation-1: -Answer and Explanation: Bacterial plasmids are best characterized as small, circular DNA molecules that are able to replicate autonomously.
Detailed explanation-2: -A plasmid is a small circular DNA molecule found in bacteria and some other microscopic organisms. Plasmids are physically separate from chromosomal DNA and replicate independently.
Detailed explanation-3: -Plasmids are used to transfer the information from one cell to another, i.e., transfer of important genes (e.g., they may confer resistance of particular, antibiotics to their bacterial cells), enabl to metabolise a nutrient, which normally a bacteria is unable to. It also helps in conjugation of bacteria.
Detailed explanation-4: -A small single circular extra-chromosomal DNA molecule which can self-replicate. Explanation: Plasmids are the extrachromosomal small circular DNA molecule that can self replicate in the cell.
Detailed explanation-5: -So, the correct option is ‘Plasmids do not depend on host enzymatic machinery for their replication’