Multiple Choice
Of the three key building blocks of DNA,which type(s) of building block is/are negatively charged and oriented on the outside of the double helical structure?
A) phosphate
B) deoxyribose
C) nitrogenous bases
D) both phosphate and nitrogenous bases
E) All of the answer options are correct.
Correct Answer:

Verified
Correct Answer:
Verified
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