Used_in The definition of C++ [ c++.syntax.html ]. Used_in The definition of Java [ java.syntax.html ] Notation This uses my XBNF Extended BNF Notation where | indicates or, (...) indicates priority. For more information see [ intro_ebnf.html ].
To look at it in another way: Thymine(uracil in RNA) and cytosine are pyrimidines. Pyrimidines are single-ringed organic base that will only attach to purines, or adenine and guanine by hydrogen bond. Because cytosine and thymine are both pyrimidines, it cannot form a hydrogen bond with each other.
Making the world better, one answer at a time. The amounts of adenine and thymine in the DNA of a human, cat, and eucalyptus tree are all very similar.Also the adenine and guanine amounts will always equal the thymine and cytosine amounts.ll DNA is made up of the same building blocks arranged on the same double helix. The difference is how the nucleotides (A,T,C,G) are arranged and how many chromosomes there a â¦ re.