For one glucose, the link reaction and the Krebs cycle send 8 NADH and 2 FADH₂ to the electron…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
For one glucose, the link reaction and the Krebs cycle send NADH and FADH to the electron transport system. The Krebs cycle also makes ATP directly. One mole of ATP holds kJ, and one mole of glucose holds kJ.
- How many ATP does the electron transport system make from these carriers?
- How many ATP come from the link reaction and the Krebs cycle in all?
- How much energy do they keep, for one mole of glucose?
- What per cent of the energy of the glucose is this?
Need a reminder? The key ideaShow
Electrons in the chain pump protons into the intermembrane space. The protons flow back through ATP synthase, whose F head makes ATP and whose F part is the channel. Two protons pass for each ATP. Without oxygen the chain stops. Substrate level phosphorylation needs no membrane, and photophosphorylation is driven by light.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. NADH: . FADH: . ATP made directly: .
Plan. Add the ATP, then turn it into energy.
Step 1. From the carriers. .
Step 2. In all. .
Step 3. Energy. kJ.
Step 4. Share. .
Answer: ; ; kJ; .
Check. The glycolysis part is not counted here. With it, the share is a little higher still.
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