1. 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,

Question

1. 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.

Kunduz · Accepted Answer

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