BISC207 Chapter Notes - Chapter 2: Metabolic Pathway, Amine, Formaldehyde

• School: University of Delaware
• Department: Biological Sciences
• Course: BISC207
• Professor: Nauen Jennifer

Document Summary

Water and carbon: the chemical basis of life. Louis pasteur, scientist who tested organisms arise from nonliving materials; resulted in finding that spontaneous generation does not occur. Chemical evolution theory maintains that inputs of energy led to the formation of increasingly complex carbon-containing substances, culminating in a molecule that could relicate itself; at this point there was switch chemical evolution to biological evolution. 2. 1 atoms, ions, and molecules: the building blocks of chemical evolution. 4 types of atoms= 96% of all matter in organisms. A central theme is structure affects function. Masses of protons, neutrons, and electrons measured using the dalton (da) unit. Named after john dalton, formulated atomic theory. 1 da each, mass of electron so small usually ignored-> mass of atom= mass number. Atomic weight of element = average of all masses of the naturally occurring isotopes based on abundance. Electrons move in regions called orbitals, each orbital can hold up to 2 electrons.