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3' vs. 5' Ends of DNA

APBIO-WED4EF

The two sides of a DNA molecule are commonly referred to as being anti-parallel in their orientation.

Which of the following statements regarding the 5' end of either side of a DNA molecule is correct?

A

The 5' end of a DNA molecule has a phosphate group attached to the 5' carbon of the final sugar.

B

The 5' end of a DNA molecule has a hydroxyl group attached to the 5' carbon of the final sugar.

C

The 5' end of a DNA molecule has a nitrogenous base attached to the 5' carbon of the final sugar.

D

The 5' end of a DNA molecule has a carboxyl group attached to the 5' carbon of the final sugar.