Nucleic acids are very small, simple molecules. structural molecules that do not have a function other than support. composed of building blocks called nucleotides. sources of cellular energy. all of the above.

composed of building blocks called nucleotides.

Nucleic acids are small but not simple molecules. They are the most important biomolecules because of their several functions. They are composed of building blocks called nucleotides but not a source of cellular energy. 

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