Which of the following abbreviations for nitrogenous bases is not found in DNA?
A) G
B) A
C) U
D) T
E) C
Question 2
Nicotine solutions are available from lawn and garden stores as an insecticide. Why must gardeners handle this product with extreme care?
A) These solutions are also toxic to plants, thus the gardeners must be careful not to apply too much.
B) These solutions are as toxic to humans as they are to insects.
C) These solutions are very effective, but also very expensive.
D) In some brands, the nicotine solutions also serves as a carrier for radioactive isotopes.
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