Which of the following characteristics make plasmid DNA useful for researchers?
Correct answer: D. All of the above
- A. Ability to incorporate cloned DNA
- B. Ability to replicate independently of chromosomal DNA
- C. Ability to be isolated from the host's genomic DNA
- D. All of the above
Explanation
Plasmids are critical tools in molecular biology due to their ability to incorporate foreign DNA, replicate independently, and be easily isolated. Each characteristic plays a vital role: incorporating DNA allows for the study of specific genes; autonomous replication ensures that once introduced, the plasmid and inserted DNA are maintained across cell generations; and isolation facilitates the analysis and manipulation of the DNA. Option D is correct as it encompasses all these beneficial properties. Options A, B, and C, while true, only partially represent the usefulness of plasmids.
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