Cellular Respiration Flashcards
(28 cards)
The formula for aerobic cellular respiration is what ?
C6H12O6 + 6O2 —> 6H2O +6CO2
About how many reactions are required for cellular respiration to occur ?
20 reactions
Is the process overall exergonic or endergonic?
Exergonic
What controls the entire process of cellular respiration ?
Enzyme activity - it lowers the activation energy, therefore catalyzing every reaction.
What is stage 1 of the cellular respiration process ?
Glycolysis - a 10 step process occurring In the cytoplasm.
How many steps occur in glycolysis?
10 steps.
Where does glycolysis occur?
In the cytoplasm
What is stage 2 of cellular respiration ?
Pyruvate oxidation - a one step process occurring in the mitochondrial matrix?
How many steps are involved in pyruvate oxidation?
One step
Where does pyruvate oxidation occur ?
In the mitochondrial matrix.
What is stage 3 of cellular respiration ?
The Kreb’s cycle - an right step prices that occurs in the mitochondrial matrix.
How many steps occur during Kreb’s cycle ?
8 steps.
Where does Kreb’s cycle occur ?
In the mitochondrial matrix.
What is stage 4 of cellular respiration ?
The electron transport chain and chemiosmosis - a multistep process that occurs in the mitochondrial membrane.
Where does the ETC and chemiosmosis occur ?
In the mitochondrial membrane.
What is substrate level phosphorylation ?
A mechanism forming ATP directly in and enzyme catalyzed reaction.
What is oxidative phosphorylation ?
A mechanism forming ATP indirectly through a series of enzymes catalyzed redox reactions involving oxygen as the final electron acceptor .
Is more ATP formed by substrate level phosphorylation or by oxidative phosphorylation ?
Oxidative as it is more complex.
Oxidative phosphorylation involves what reductions?
NAD+ —> NADH
FAD+ —> FADH2
Where does NADH and FADH2 transfer most of their energy to ?
ATP molecules
In glycolysis, how many ATP are produced ?
4 ATP
In glycolysis, how many ATP are used ?
2 ATP
What net ATP did glycolysis produce ?
2 ATP
Describe the Kreb’s cycle:
A cycle series of reactions that transfers energy from organic molecules to ATP, NADH & FADH2 while also removing CO2.
