High School

You expose three unknown bacterial strains plus a wild type to DNA damaging agents. You observe the following survival percentages:

- Strand A: 75%
- Strand B: 20%
- Strand C: 10%
- Wild type: 5%

Which bacterial strain is most resistant to DNA damage?

Answer :

Final answer:

Strand A, with a 75% survival rate after exposure to DNA damaging agents, is the most resistant to DNA damage compared to the other strands and the wilt type. The correct option is A.

Explanation:

To determine which bacterial strand is most resistant to DNA damage, we need to look at the survival percentages of the strains after exposure to DNA damaging agents. Strand A shows the highest survival rate at 75%, indicating it has the most robust DNA repair mechanisms or the highest inherent resistance to the damage caused by these agents. In contrast, the wilt type represented the least resistant with only 5% survival, and Strands B and C displayed intermediate levels of resistance at 20% and 10%, respectively. Thus, Strand A is the most resistant to DNA damage.

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