Step 11 involves dehydration and ring closure and completes the initial phase of purine biosynthesis. Unlike Step 6, this ring closure does not require ATP. Why?

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive