Are hexane and cyclohexane isomers? Why or why not?

No, they are not isomers

Explanation:

"The molecular formula of cyclohexane is C6H12 while of hexane, it is C6H14. The isomers are those molecules which have same molecular formula. Hence on this bases, the above two are not isomers"

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.