A researcher is involved in the investigation of an individual's genetic abnormality. Which of the following situations could the researcher most likely rule out as the genetic cause of a mutation?
A)
Loss of a cytosine-guanine base pair
B)
Formation of an adenine-uracil base pair
C)
Substitution of an adenine-thymine base pair for a cytosine-guanine base pair
D)
Insertion of an extra adenine-thymine base pair
Ans:
B
Feedback:
RNA contains uracil instead of thymine. Formation of an adenine-uracil base pair is a normal event during assembly of messenger RNA.
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