Which of the following statements correctly describes one of Chargaff's rules regarding DNA?
A. The percentages of adenine and thymine are roughly equal, as are the percentages of guanine and cytosine in the DNA of a given species.
B. DNA base composition does not vary between species.
C. The percentages of adenine and cytosine are roughly equal, as are the percentages of guanine and thymine in the DNA of a given species.
D. DNA has a double helical structure.
Ans: A. The percentages of adenine and thymine are roughly equal, as are the percentages of guanine and cytosine in the DNA of a given species.
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