CAS BI 108 Lecture Notes - Lecture 8: Exergonic Process, Anabolism, Catabolism

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Chapter 8 Energy & Metabolism
A. Intro
a. Metabolism- Sum of all chemical reactions in organism
i. Catabolism- Input molecules (e.g. glucose) converted to
products; energy generated (stored as ATP)
1. Glucose  Products & Energy (ATP)
ii. Anabolism: Complex molecules (e.g amino acids) are made
from simple molecules; energy input required
1. Substrate  Amino Acids
b. Metabolism complex > 1000 reactions in cells
c. Similar in all cells
B. Energetics
a. Gibbs Free Energy
b. Delta G = G(products)- G (substrates)
c. G Is appropriate, detained for constant temperature and pressure
d. Delta G^o = Delta G Zero
i. Delta G at equilibrium
e. When Delta G or Delta G Zero is:
i. Negative Positive
-Free Energy is released -Free energy is consumed
-Reaction is spontaneous -Not spontaneous
-Favorable -Downhill
-Exergonic -Endergonic
f. Units of energy
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