alleryStart learning →How does antibiotic resistance often spread through a colony of bacteria?
ABy the exchange of ribosomes
BBy the exchange of nucleoids
CBy the exchange of histones
DBy the exchange of plasmids
Answer & Solution
Correct answer: D. By the exchange of plasmids
1. Plasmids are small loops of DNA separate from the main bacterial chromosome.
2. Bacteria can pass these plasmids to other bacteria.
3. A plasmid can carry a useful gene, such as one giving antibiotic resistance.
4. The receiving cell gains the trait without dividing, so resistance spreads through the colony.
_Source: OpenStax Biology 1e (CC BY 4.0), Chs 10 and 11, section 10.1 Cell Division_
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