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Cellular Respiration
Autotroph - make own food
Heterotroph - obtain food
Def: Production of energy
in a cell
Raw Materials
Glucose Oxygen Water
* ATP, enzymes, NAD+, ADP + Pi <~ must be present
End Products
ATP H2O CO2
* NAD+, oxaloacetic acid
Aerobic - O2
is the final electron acceptor Anaerobic - Organic compound
is final acceptor720 kcal energy / mole of glucose catabolized 2 ways to make ATP
Substrate Level Phosphorylation Chemiosmosis
ATP Synthesis
Goal of Cellular respiration & light rxns
of Ps is the production of ATP Two Ways to make ATP
Substrate Level Phosphorylation
Occurs in glycolysis & Kreb's Cycle Evolutionarily, the first method of ATP production
Using ATP to make a little bit more ATP Taking phosphate from a molecule to ADP Coupled Reactions
First there is a highly endergonic rxn Exergonic reaction releases more energy than
endergonic requires Occurs w/o O2
Chemiosmosis
Most of ATP in higher organisms is produced this
way Involves the use of transmembrane proteins Proton Pump: creates
gradient
Excited electrons change shape of protein Protons then return by diffusion thru ATP synthasase
channel
This energy is used to couple ADP & Pi (PO4)
to make ATP
*All organisms, the source of the electrons is from the chemical bonds
of organic molecules.
Proteins Lipids Carbos Nucleic Acids
In the ETC (Electron Transport Chain), coenzymes
(NAD+ / FAD) along w/ cytochromes carry electrons across
the mitochondrial membranes. NAD+ ~> NADH + H+
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