Aerobic respiration Flashcards
What’s the first step of aerobic respiration if glucose is the carbon source?
Glycolysis
What happens in the first half of glycolysis?
Glucose gets split into 2 G3P and uses 2 ATP
What happens in the second half of glycolysis?
Each G3P undergoes a few more reactions to produce 2 pyruvate and produces 4 ATP by substrate-level phosphorylation and 2 NADH
What is the net outcome of glycolysis?
Glucose is oxidized to 2 pyruvate, 2 NADH are produced, and get a net production of 2 ATP (2 used, 4 produced)
What’s the second step of aerobic respiration?
Citric acid cycle
What happens to pyruvate before entering the CAC?
Gets oxidized into CO2 and Acetyl-CoA and makes another NADH
How does acetyl-CoA enter the CAC?
Reacts with oxaloacetate to become citric acid, then enters the cycle
What is the net outcome of the citric acid cycle?
6 NADH, 2 FADH2, 2 GTP and oxaloacetate is regenerated
What is the third step of aerobic respiration?
Oxidative phosphorylation
How is the PMF generated?
The electron shuttles bring their electrons to the ETC components in the membrane and drop them off at the first one. The electrons then move from one carrier to the next and release energy at each jump. The energy released by the electrons is used to power a proton pump to pump one proton across the membrane
What is the terminal electron acceptor of aerobic respiration?
Oxygen
What does oxygen become when it accepts the electrons from the ETC?
Water
Why is aerobic respiration considered to be the best system?
Starting from NADH and going to oxygen releases the most energy possible
Where in aerobic respiration does most of the ATP come from?
Oxidative phosphorylation
