I need help

[Jezza]

Hi guys,

I've been having trouble with explaining Glycolysis, The Krebs Cycle and Electron Transport in detail.

Can someone please explain it to me in basic detail if they can.

Thanks

[drcrowthorne]

Glycolysis: The first stage of cellular respiration, it occurs in both aerobic and anaerobic cellular respiration. Glucose is broken up into two molecules of pyruvate, which also produces 2 molecules of NADH and a molecule of ATP.

Krebs Cycle: The second stage of cellular respiration, it occurs in only aerobic cellular respiration. Each pyruvate molecule is broken up, producing two molecules of CO2, and facilitating the formation of 4 molecules of NADH, and a molecule of FADH2 (Note: all amounts in terms of one pyruvate. Multiply by two to get how much is produced for two pyruvates.) Note also, the process begins with an enzyme called coenzyme A breaking off a carbon from pyruvate producing CO2, and acetyl coenzyme A.

Electron Transport: The carrier molecules (NADH and FADH2) release electrons, which travel down cytochromes on the surface of the cristae. These electrons release energy, and facilitate the phosphorylation (a word meaning addition of phosphate to) of ADP, to produce ATP. The electrons are then captured by oxygen atoms, to produce oxide ions. The carrier molecules also released hydrogen ions, which now combine with the oxide ion to produce water.

This is what the three process really are I reckon. Please tell me if I've got anything wrong. I hope it helps

[Jezza]

Glycolysis: The first stage of cellular respiration, it occurs in both aerobic and anaerobic cellular respiration. Glucose is broken up into two molecules of pyruvate, which also produces 2 molecules of NADH and a molecule of ATP.

Krebs Cycle: The second stage of cellular respiration, it occurs in only aerobic cellular respiration. Each pyruvate molecule is broken up, producing two molecules of CO2, and facilitating the formation of 4 molecules of NADH, and a molecule of FADH2 (Note: all amounts in terms of one pyruvate. Multiply by two to get how much is produced for two pyruvates.) Note also, the process begins with an enzyme called coenzyme A breaking off a carbon from pyruvate producing CO2, and acetyl coenzyme A.

Electron Transport: The carrier molecules (NADH and FADH2) release electrons, which travel down cytochromes on the surface of the cristae. These electrons release energy, and facilitate the phosphorylation (a word meaning addition of phosphate to) of ADP, to produce ATP. The electrons are then captured by oxygen atoms, to produce oxide ions. The carrier molecules also released hydrogen ions, which now combine with the oxide ion to produce water.

This is what the three process really are I reckon. Please tell me if I've got anything wrong. I hope it helps

Thanks for the summary. It's all correct by the looks of it.

[drcrowthorne]

Thanks I think I got something wrong though, pyruvate produces 3 co2, not 2 :S