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A strand of DNA in a skin cell contains the bases:
A-T-G-C-C-A-T-C-G-G-T-A
After the cell is exposed to ultraviolet light, the strand contains the bases:
A-T-G-G-C-C-A-T-C-G-G-T-A
Which statement describes the result of this exposure?
(1)A new base has been inserted.
(2)A base has been deleted.
(3)One base has been substituted for another.
(4)There have been no changes in the bases.

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MissPhiladelphia
I think the correct answer from the choices listed above is option 1. The statement that would describe this insertion would be that a new base had been inserted. As you can see, G is inserted between G and C. Hope this answers the question. Have a nice day.

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