[BIOCHEM 2EE3] - Midterm Exam Guide - Ultimate 47 pages long Study Guide!
7 Feb 2017
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The chemical elements of cells and organisms: life could only come into being when certain elements carbon, hydrogen, oxygen, nitrogen, phosphorus and sulfur (chonps) were abundant! Depends on but other compounds have essential jobs too: the primordial universe was almost all made up of hydrogen and helium because only these simple elements were made through condensation of matter after the big bang. These were rst generation stars: after 7-8 billion years, early rst generation stars burned their hydrogen and helium in thermonuclear rxns making heavier elements. First they made carbon nitrogen and oxygen. Then they eventually made all the other elements in the periodic table: large early stars matured and became unstable and exploded into novas and supernovas. Heavier elements were spread throughout the cosmic surroundings. This matter condensed again and made second generation stars like our sun that have planetary systems around it incorporating these new heavy elements: our universe is rich in second generation stars.
