The nucleoside below is found in DNA and not RNA. Which of the following statements supports this molecule being a DNA nucleoside?
A) The molecule is the β-anomer.
B) The molecule contains a pyrimidine.
C) The molecule contains a purine.
D) The molecule contains a 2-deoxy-d-ribose.
E) The molecule contains a d-ribose.

Question

The nucleoside below is found in DNA and not RNA. Which of the following statements supports this molecule being a DNA nucleoside? 
A) The molecule is the β-anomer. 
B) The molecule contains a pyrimidine. 
C) The molecule contains a purine. 
D) The molecule contains a 2-deoxy-d-ribose. 
E) The molecule contains a d-ribose.

Quizplus · Accepted Answer

The presence of 2-deoxy-d-ribose (which lacks an OH group at the 2' position) is characteristic of DNA nucleosides, while RNA nucleosides contain d-ribose with an OH group at the 2' position. The presence of a pyrimidine or purine base does not specifically identify a nucleoside as being from DNA or RNA, and the β-anomer is present in both DNA and RNA nucleosides.

The Nucleoside Below Is Found in DNA and Not RNA