Chapter 13 Flashcards
Reactants of cellular respiration
C6H12O6 + 6O2
Products of cellular respiration
6CO2 + 6H2O + E
What does cellular respiration do?
release energy that is used to create ATP
what reactions make up cellular respiration
catabolic reactions
The first stage of cellular respiration
Glycolysis
Where does glycolysis occur?
cytoplasm
Second stage of cellular respiration
Acetyl-CoA synthesis
Where does Acetyl- CoA synthesis occur?
mitochondrial matrix
Third stage of cellular respiration
Kreb’s cycle (aka citric acid cycle)
where does the krebs cycle occur?
mitochondrial matrix
what is the fourth and final stage of cellular respiration
electron transport chain (aka oxidative phosphorylation)
where does the electron transport chain occur?
inner mitochondrial membrane
How much ATP does cellular respiration produce
32
oxidation
loses electrons (OIL -> Oxidation Is Losing)
reduction
gains electrons (RIG -> Reduction is Gaining)
oxidation in cellular respiration
glucose -> 6CO2
reduction in cellular respiration
6O2 -> 6H2O
oxidation reactions
release energy and form products with less potential energy
reduction reactions
require energy and form products with more potential energy
electron acceptor (also functions as an oxidizing agent in electron carriers)
NAD+
what occurs during glycolysis
-breakdown of glucose to make pyruvate
- a modest amount of energy is released
what occurs during Acetyl CoA Synthesis
- pyruvate converted to acetyl-coenzyme A
- CO2 is produced
what occurs during Kreb’s cycle?
- pyruvate is oxidized to oxalate to produce ATP and energy carriers (NADH and FADH2)
- Acetyl- CoA is broken down
- more CO2 released
How do cells harvest energy in glucose molecules?
oxidative phosphorylation
chemiosmosis
moving ions/proteins to the other side of the biological membrane
What does Atp Synthase do?
converts energy of proton gradient into energy of ATP
Subunits of ATP Synthase
- F1 catalyzes the synthesis of ATP
- F0 forms a channel that rotates as protons pass through it
chemical energy in stages 1-3 is transferred to two types of energy-storing molecules
- ATP
- Electron Carriers
What does Oxidative phosphorylation
- electron carriers donate the high energy electrons to the electron transport chain (generates ATP)
