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Question
What are plasmids? Describe their role in bacteria?
Solution
In addition to the genomic DNA (the single chromosome/circular DNA), many bacteria have small circular DNA outside the genomic DNA. This smaller DNA are called plasmids. The plasmid DNA confers certain unique phenotypic characters to such bacteria. One such characteristic is resistance to antibiotics. This plasmid DNA is used to monitor bacterial transformation with foreign DNA.
RELATED QUESTIONS
Which of the followings is always ABSENT in prokaryotic cells?
Select one which is not true for ribosome.
Which one of these is not a eukaryote?
Which of the following features is common to prokaryotes and many eukaryotes?
Which of the following is not true of a eukaryotic cell?
Is extra genomic DNA present in prokaryotes and eukaryotes? If yes, indicate their location in both the types of organisms.
The genomic content of the nucleus is constant for a given species where as the extra chromosomal DNA is found to be variable among the members of a population. Explain.
