Which best describes bacterium?
a. the shell surrounding a pilus
b. a particle that attacks viruses
c. a single celled organism
d. a type of virus

All of them are man made

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.

The answer is letter c

A.true this might be wrong, but if it's not wrong, mark me brainliest.