Changes

"A" represents:

"'''A'''" represents:

:[[Adenine]], which is a purine base in [[DNA]] and [[RNA]]; "A" pairs with [[thymine]] in DNA or [[uracil]] in RNA.  

:[[Adenine]], which is a purine base in [[DNA]] and [[RNA]]; "A" pairs with [[thymine]] in DNA or [[uracil]] in RNA.