IB Biology

Involves the loss of electrons from an element Also frequently involves gaining an oxygen or losing hydrogen PS II Oxidation of H2O

Involves the gain of electrons Also frequently involves losing oxygen or gaining hydrogen Oxidized Reduced Oxidized Reduced Oxidized Reduced

The oxidative part refers to the process in the presence of oxygen (as final electron receptor in the ETC) The phosphorylation part refers to the addition of an inorganic phosphate (P i ) to ADP in order to produce ATP Uses ATP Synthase enzyme Occurs only in cellular respiration

Cristae form a large membrane surface area for the ETC Small space between inner and outer membranes for the accumulation of protons Fluid matrix containing enzymes for Krebs Cycle

Glycolysis is the cutting or breaking of the 6- carbon glucose into two 3-carbon pyruvates Each 3-carbon pyruvate undergoes a link reaction to form a 2-carbon acetyl CoA so that it can bond to the 4-carbon oxaloacetate to make a 6-carbon molecule to start the Krebs Cycle.