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.
The term undergraduate degree is a general term that means you are in a two or four-year program after high school completion while the term graduate degree means that you are working toward a higher degree after completing a four-year degree at a college or university. Source(s): I'm always write.