The letters "D" and "R" are designated to represent what?
a. "D" - phosphate and "R" - ribose sugar
b. "D" - ribose or deoxyribose sugars and "R" - nitrogenous bases
c. "D" - deoxyribose sugar and "R" - adenine
d. "D" - ribose sugar and "R" - deoxyribose sugar
e. "D" - deoxyribose sugar and "R" - ribose sugar
Answer: e. "D" - deoxyribose sugar and "R" - ribose sugar
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