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.
A Doctor of Philosophy (Ph.D.) degree is one type of doctoral degree and is generally considered the most advanced degree available in any particular field. Graduating with a Ph.D. degree involves completing a wide range of classroom coursework, comprehensive exams and an original doctoral dissertation.andidates complete an original thesis on a topic that is usually related to their area of concentration. Some of the courses that may be included in this degree's curriculum are: 1  Native American landscapes. 2  Postmodernism and the visual arts. 3  Contemporary African art.