Question

Which statement(s) regarding plasmids is/are incorrect?

1. Self-replicating
2. Single-stranded DNA
3. Double-stranded DNA
4. Confer antibiotic resistance
5. Part of genomic DNA

• A. 1, 3, 4
• B. 2, 5
• C. 2, 5, 4
• D. 3, 5

Answer 1

The correct option is B 2, 5

Plasmids are extra-chromosomal, self-replicating circular double-stranded DNA molecules present in bacteria.
Plasmids are not part of genomic DNA. They confer properties like antibiotic resistance to the bacteria or to the organism in which they are present. Hence, 1, 3, 4 are correct while 2, 5 are incorrect.