The opposite of random may be a better starting point. RNA we think of mainly functions a message from DNA to build protein. but it is not too shocking there

The opposite of random may be a better starting point. RNA we think of mainly functions a message from DNA to build protein. but it is not too shocking there are other "messages" or conveniently shaped molecules to aid or inhibit existing cellular processes. Yet another reason the word "gene" is unsafe to use except in reference to a heritable trait.