Question

What is different about the primary structure of RNA and DNA?

Short answer

The difference in the primary structure of RNA and DNA is that RNA contains the sugar ribose, whereas DNA has the sugar deoxyribose

Step-by-step solution

Given information

We need to find difference about the primary structure of RNA and DNA

Simplify

DNA and RNA are distinguished by two characteristics:
(a) RNA contains the sugar ribose, whereas DNA has the sugar deoxyribose, which is slightly different (a type of ribose that lacks one oxygen atom)
(b) The nucleobase uracil is found in RNA, whereas thymine is found in DNA.