A 45-year-old client who experienced exposure to radiation during an industrial accident several years prior is being assessed. Which of the following phenomena may underlie the genetic changes that have been noted in the client?
A)
Base pairs may have been rearranged by the radiation in the accident.
B)
Endonucleases may have influenced the DNA structure following exposure.
C)
Two paired bases may have exchanged helical position after the accident.
D)
The radiation may have produced a redundant or degenerate genetic code.
Ans:
A
Feedback:
Radiation exposure can cause the rearrangement of base pairs and resultant mutation. Endonucleases facilitate gene repair, and base pairs are not noted to swap positions from their respective sides of the helical strand. Redundant or degenerate genetic code is a normal trait.
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