Ch 9: Harvesting Chemical Energy
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Cellular respiration is …
Catabolic
Synthesis is synonymous with…
Anabolic
Cellular respiration producesssss
6 CO2 and 6 H20 and 38 ATP
Cellular respiration is … percent efficient
40%
Cellular respiration reactants
Glucose and oxygen
The average human needs …. Kcal per day
2200
Cellular respiration summary
Electrons are stripped from hydrogen and ultimately do oxygen?
Redox is short for
Reduction and oxidation
Reduction
Gain an electron
Oxidation gibbs E vs reduction gibbs E
Negative, positive
In CR, electrons are synonymous with
Hydrogen
When molecules carry hydrogen they are in a … form
Reduced
NAD+ is a …
Hydrogen shuttle
Two main mechanism used during CR to make ATP
Substrate level phosphorylation and
What is substrate level phosphorylation?
Direct synthesis of ATP from ADP and a reactive intermediate, typically a high E phosphate containing molecule
Three stages of CR
Glycolysis, Krebs, and Electron Transport Chain (ETC)
Where does glycolysis occur?
Cytoplasm
What reaction occurs between glycolysis and krebs? Where does this happen?
Acetyl Co A reaction, the mitochondrial matrix
Where does the krebs cycle occur?
Mitochondrial matrix
Where does ETC occur?
The inner mitochondrial membrane (cristae)
What happens in glycolysis?
Glucose splits into 2 molecules (which are 2 pyruvate); glyco - lysis
Glycolysis in and out
Glucose and 2 ATP -> 2 pyruvate and 2 NADH and 4 ATP
There are 10 steps in glycolysis that all use the same enzyme
Wrong they all use different enzymes
Glycolysis steps 1 through 5 are … while 6 through 10 are …
Endergonic, exergonic