Read the following statements regarding plasmids: (A) They are extrachromosomal DNA molecules. (B) They can replicate autonomously independent of the control of chromosomal DNA. (C) They are typically single-stranded DNA molecules. (D) They are linear DNA molecules. How many of the above statements are correct?

Step-by-step solution

Plasmids are small, circular, double-stranded, extrachromosomal DNA molecules found in bacteria and some other organisms. Statement (A) is correct as they are distinct from the main chromosomal DNA. Statement (B) is correct because they possess their own origin of replication (ori), allowing them to replicate autonomously independent of the chromosomal DNA. Statement (C) is incorrect because plasmids are double-stranded DNA molecules, not single-stranded. Statement (D) is incorrect because plasmids are circular DNA