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.
graduate noun [C]. âº a âstudent who has completed a university or college degree: a 2010 college graduatea graduate of sth Li is a graduate of Beijing University. an Oxford/Harvard/Columbia graduate a psychology/âjournalism/âengineering graduate.