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.
Definition of postgraduate for English Language Learners. : a student who continues to study for an advanced degree after earning a bachelor's degree or other first degree : a graduate student.
graduate. 1  To be awarded an academic degree or diploma by a school, college, or university. A graduate is a person who has been awarded such a degree or diploma. 2  a person who has been awarded a degree or diploma. a graduate in French.