Question

Suppose bacteria are grown on a petri dish that contains nutrient agar and the antibiotic ampicillin. After observing the bacteria growth on the plate for two days, you notice that only some of the bacteria have survived. What is a plausible explanation for your observations? A. F plasmids were not present to transfer bacterial DNA. B. The pill of the bacterial could not attach to the ampicilin C. The bacteria that survived were transformed with a plasmid that contains the resistance gene for amploillin D. Some of the bacterial DNA was not able to replicate because it lacked some of its own genetic material

Answer 1

Answer:

C. The bacteria that survived were transformed with plasmid that contains the resistance gene for ampicillin.

Explanation:

Plasmids are small, circular double stranded DNA molecules that are found in bacteria. It carries genes that provides the bacteria with an advantage.

There are five types of plasmids namely, Fertility F-plasmids, resistance plasmids, Virulence plasmids, degenerative plasmids and the Col plasmids.

Ampicillin is an antibiotic that is supposed to kill the bacteria. However, most bacteria have resistance plasmids that can lead to antibiotic resistance.

That explains why some of the bacteria survived.