Which of the Following Statements About the 5′ End of a Polynucleotide

Multiple Choice

Which of the following statements about the 5′ end of a polynucleotide strand of RNA is correct?

A) It has a hydroxyl group attached to the number 5 carbon of ribose.
B) It has a phosphate group attached to the number 5 carbon of ribose.
C) It has phosphate attached to the number 5 carbon of the nitrogenous base.
D) It has a carboxyl group attached to the number 5 carbon of ribose.