Molecular structure of DNA. The basic unit of DNA is the nucleotide, consisting of a phosphate group, a sugar molecule (deoxyribose) and one of four nucleobases (also known as bases): adenine (A), thymine (T), guanine (G) or cytosine (C).
Majors That Pay You Back. 1  Choosing a major makes an even bigger impact on future earnings than deciding which school to attend. PayScale ranks the highest paying college majors for associate, bachelor's and graduate degrees. Top 5 Associate Degrees. A 4-year degree isn't a requirement for career success. If you want a 2-year degree that leads to high pay, check out the associate degree majors on this list.
The president of the United States holds, arguably, the most important job in the world, and according to Article II, Section I of the U.S. Constitution, is entitled to an annual salary â the highest salary of all federal employees. George Washington was paid $25,000 per year, and the presidential salary has only been increased five times since 1789.