Question

Which among the following statements is not correct about plasmids?

• A. It has a circular DNA
• B. It has an antibiotic-resistant gene
• C. It has the ability of autonomous replication
• D. Its DNA is as long as chromosomal DNA

Answer 1

The correct option is D

Its DNA is as long as chromosomal DNA

The correct option is D:

Explanation for the correct option:

1. Along with the bacterial chromosomal DNA, the plasmid is an additional bit of DNA found in a bacterial cell.
2. Plasmids are found in almost all bacterial cells, but certain species do not.
3. A plasmid's DNA, on the other hand, is not as lengthy as chromosomal DNA.
4. Plasmids can be anywhere from a thousand DNA base pairs to hundreds of thousands of base pairs in length.
5. Both bacterial and certain eukaryotic cells naturally contain plasmids.
6. Plasmids frequently carry genes that give bacteria genetic advantages like antibiotic resistance.
7. Each daughter cell of a bacterium receives a copy of every plasmid that is present in the mother cell when it divides.
8. Through a process known as conjugation, bacteria can also exchange plasmids with one another.

Final answer: Its DNA is as long as chromosomal DNA is not a correct statement about plasmids.