What is a plasmid?
Quick Answer
A plasmid is a small circular DNA molecule found in many bacteria, separate from the main chromosome. Plasmids often carry useful genes such as antibiotic resistance.
The Full Story
Plasmids are extra-chromosomal DNA circles that bacteria can replicate independently of their main chromosome. They often carry genes that give bacteria advantages, including antibiotic resistance, toxin production, or new metabolic abilities. Some plasmids can move between bacteria through horizontal gene transfer, which helps spread resistance traits rapidly. Scientists also use engineered plasmids as tools in genetic engineering and biotechnology.
Key Facts
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Suggested video title for this topic:
"The tiny DNA rings that change bacteria"
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