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.
U.S. Government recognized definition of a 'College Graduate': Bachelor's degree or higher is a commonly used term by the US Census Bureau and other United States government agencies on the federal as well as state and local level. Master's degree usually requires that you already have a Bachelor's degree before starting on it. A Master's degree is usually the lowest level of Graduate degree. The other type of Graduate degree is a Doctorate.