cellular respiration, can someone fill the blank part, the ? part. asap

Question

The electrons and protons from the NADH and FADH2 molecules produced in the first two steps are then passed along the ? ? and chemiosmosis is used to produce ? ATP

Answer 1

First blank is the electron transport chain.

 

Second blank is the number of ATP produced from NADH and FADH2 molecules. This depends on a few factors. Let's define the process though first, and see what we get from each step.

 

Glycolysis = 2 ATP and 2 NADH
Oxydative decarbocilation = 2 NADH
Krebs = 6 NADH, 2 FADH2, 2 ATP (or can be GTP)

 

According to this chart, there are a total of 10 NADH molecules and 2 FADH2.

 

1 NADH will generates 3 ATPs
1 FADH2 will generates 2 ATPs

 

So, combining those factors, you can see that 30 ATP will be made from NADH, and 4 ATP will be made from FADH2, and if you add the 4 ATP from the krebs cycle and glycolysis, that is 38 total.

 

However, if the 2 NADH formed in glycolysis give their H+ to FADH+, 2 ATP will be made (total of 36). If it gives it to, NAD+, 38 will be made (since NADH makes 3 ATP, and FADH2 makes 2 ATP).

 

Hope this helps, in summary, it is 36-38 ATP made per glucose molecule.