BI110 Lecture Notes - Lecture 2: Catabolism, Hemoglobin, Anabolism
Document Summary
Similarities same chem foundations & physical laws, but relative abundance. When organisms convert input energy, organisms convert input into heat & work ces differ ut energy into heat & work. The degree of disorder in the universe tends to decrease (entropy = Able to change in response to the enviro. Smallest unit of life, usually very tiny; 0. 1mm. Exceptions: nerve cells ~ 1m long, ostrich egg: unfertilized ost a single cell (weigh about a kg) May be single or part of an ensemble. Cell -> tissue -> organ -> organ system -> organism. A plasma mem that creates a distinct boundary separating the cell in from the external enviro. An ability to harness materials + energy from the enviro. Dna: double stranded helix w/ 4 subunits connected in a strand. Can be pulled apart into single strands (rna) in order to be copied reproduced to its progeny. Rna can also be transcribed & translated into proteins.
