Which of the labeled structures are found in DNA but not RNA?
1 A
2 B
3 C
4 E

A)1 only
B)2 only
C)3 only
D)4 only
E)1 and 4

Question

Which of the labeled structures are found in DNA but not RNA?
1 A
2 B
3 C
4 E

A)1 only 
B)2 only 
C)3 only 
D)4 only 
E)1 and 4

Quizplus · Accepted Answer

Structures A and E are both found in DNA but not RNA. A is the deoxyribose sugar and E is the thymine base. RNA instead contains ribose sugar and the base uracil instead of thymine. Structures B and C are found in both DNA and RNA. Structure D is a phosphate group found in both DNA and RNA. Therefore, the best choice is E, because it includes structures A and E which are unique to DNA.

Which of the Labeled Structures Are Found in DNA but Not