In the laboratory, several factors are known to cause alteration of the chemical structure of DNA. The factor(s) likely to be important in a living cell is/are:
A) heat.
B) low pH.
C) oxygen.
D) UV light.
E) both oxygen and UV light.

Question

Quizplus · Accepted Answer

Both oxygen and UV light are significant factors that can cause alteration of the chemical structure of DNA in living cells. Oxygen can lead to oxidative damage, while UV light can cause direct DNA damage by forming thymine dimers and other photoproducts.

In the Laboratory, Several Factors Are Known to Cause Alteration