Your cells contain two types of nucleic acids, ribonucleic acid and deoxyribonucleic acid, or RNA and DNA, respectively. They differ from the other macronutrients in that they are not a source of calories in your diet, and their role is strictly to direct the synthesis of new protein molecules.
The definition of a postgraduate is a student who is studying a subject beyond the college level when he already has a college degree. Someone attending medical school is an example of a postgraduate.
post-graduate degree meaning, post-graduate degree definition | English Cobuild dictionary. postgraduate. 1 n-count A postgraduate or a postgraduate student is a student with a first degree from a university who is studying or doing research at a more advanced level. 2 adj Postgraduate study or research is done by a student who has a first degree and is studying or doing research at a more advanced level. (BRIT) ADJ n. ...postgraduate courses..., Dr Hoffman did his postgraduate work at Leicester University. in AM, use graduate.