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.

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. 

They are like other investigations? say there was a murder u have to do blood test and finger prints which run through a lab.