Question 1
Describe the mutagenic action of the following two mutagens: 5-bromouracil and ultraviolet light.
Question 2
Some mutagens cause genetic changes that can be "corrected" by reexposing cells to the same mutagen. Other mutagens do not behave in this way. Provide one example of each of these two types of agents and describe the mutational changes caused in DNA. Explain why some mutagens behave in one way, whereas others do not.