A cell respires 0.8 mol of glucose completely, and each glucose molecule earns 36 ATP…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A cell respires mol of glucose completely, and each glucose molecule earns ATP. One mole of glucose holds kJ, and one mole of ATP holds kJ.
- How much energy is in the glucose?
- How many moles of ATP are made?
- How much energy is kept in ATP?
- What per cent of the energy of the glucose is this?
- How much energy is not kept in ATP?
Need a reminder? The key ideaShow
Plants exchange gases through stomata, lenticels and roots, and each part looks after itself. Cellular respiration breaks food down in steps and traps energy in ATP. One mole of glucose holds kJ, and one mole of ATP holds about kJ. The share kept in ATP is the energy kept divided by the energy of the glucose.
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. Glucose: mol. ATP for each glucose: .
Plan. Find the energy in the glucose, then the ATP, then the energy that the ATP holds.
Step 1. Energy in the glucose. kJ.
Step 2. ATP made. mol.
Step 3. Energy kept. kJ.
Step 4. Share. .
Step 5. The rest. kJ.
Answer: kJ; mol; kJ; ; kJ.
Check. The share is a little under two fifths, as the lesson says.
Watch out. The rest of the energy is not lost. It is let out as heat, and it keeps a living body warm.
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