The group of molecules called nucleotides contain:
                A)           phosphate groups.
                B)            pyrimidines.
                C)            purines.
                D)           pentose (a 5-carbon sugar).
                E)            all of the above.



Answer :

The group of molecules called nucleotides contain  phosphate groups, pyrimidines, purines, and pentose (a 5-carbon sugar). Therefore, E. all of the above is the correct answer.