Some bacteria have a higher incidence rate of thymine dimer mutations following exposure to UV light than others.What might be going on here to lead to this outcome?
A)They may simply have a higher proportion of T nucleotides next to each other in their DNA sequences than other bacteria,leading to more possible dimers being formed.
B)They may have a stronger expression of photoreactivation enzymes,leading to more thymine dimers being formed and retained.
C)They may have a weaker expression of photoreactivation enzymes,leading to more thymine dimers being formed and retained.
D)They may simply have a higher proportion of T nucleotides next to each other in their DNA sequences than other bacteria,leading to more possible dimers being formed AND they may have a stronger expression of photoreactivation enzymes,leading to more thymine dimers being formed and retained.
E)They may simply have a higher proportion of T nucleotides next to each other in their DNA sequences than other bacteria,leading to more possible dimers being formed AND they may have a weaker expression of photoreactivation enzymes,leading to more thymine dimers being formed and retained.

Question

Quizplus · Accepted Answer

The higher incidence rate of thymine dimer mutations following exposure to UV light in some bacteria could be due to a combination of factors. These bacteria may have a higher proportion of T nucleotides next to each other in their DNA sequences than other bacteria, which could lead to more possible dimers being formed. Additionally, they may have a weaker expression of photoreactivation enzymes, leading to more thymine dimers being formed and retained.

Some Bacteria Have a Higher Incidence Rate of Thymine Dimer