BIOL130 Lecture 8: BIOL 130 – Week Four Notes (Energy - LEC 8,9)

• School: University of Waterloo
• Department: Biology
• Course: BIOL130
• Professor: Heidi Engelhardt

Document Summary

Obtained from chemical bond energy stored in food". Most important source is carbohydrate (sugar: sugars oxidized to co2 and h2o. Energy stored/transported in high energy bonds of activated carrier molecules (e. g. atp and nadh) Activated carrier molecules = what energy generated from the oxidization of food molecules is stored as until needed: provide energy for biosynthetic reactions, contain 1 or more high energy content bonds. Electron carriers = the key players in the harvesting of energy during the oxidization of glucose. Examples: modified nucleotides, coenzymes (bound by particular enzymes; necessary for their function) carry electrons from one reaction to another. Readily accept a hydride atom (h-, 2 electrons and a proton) and donate it. Hydride - rather than 1 electron orbiting around nucleus, we now have 2 -vely charged hydrogen atom. Low energy oxidized form high energy reduced form (ex. Nad nadh, fad fadh2: nad+ + h+ + 2e- nadh (reduction) // nadh.