Question

Which is the term for replicating circular pieces of DNA that often carry antibiotic-resistant genes?

A. vectors
B. viruses
C. bacteriophages
D. plasmids

Answer 1

Answer: d. plasmid

Explanation: Plasmid is the circular DNA, self-replicating and different from chromosomal DNA. Plasmid consist of an antibiotic-resistant gene means it is able to resist the results of an antibiotic so that they were once sensitive. Some of the antibiotic resistance genes are kanamycin and tetracycline.

Hence, Plasmid is the replicating pieces of DNA that carry the antibiotic resistant gene.

Answer 2

I think the correct answer from the choices listed above is option D. Plamids is the term for replicating circular pieces of DNA that often carry antibiotic-resistant genes. Plasmid is a kind of small circular DNA which contains at least one gene. One of the gene is the antibiotic-resistant gene.