Electron Transport Chain

Question 1

Why do we need NADH+H+ and FADH2?

Answer 1

To bring electrons to the ETC?

Question 2

What is the main goal of the ETC?

Answer 2

To set up mem. potential to synthesize ATP in ATP synthase

Question 3

What is membrane potential?

Answer 3

The diff. in proton charge across a mem. that forms a gradient. Allows H+ to diffuse through ATPase.

Question 4

Why is Oxygen essential for ETC?

Answer 4

It Acts as a final e- acceptor
Allowing the ETC to continue functioning
W/o O2, ETC would back up & halt

Question 5

ETC steps

Answer 5

NADH donate e- and H+ in complex 1, and H+ and e- move down the ETC. Since integrated proteins reduce and oxidize, they spin, moving e- down the stairs. Therefore, the ETC absorbs the energy made by e- to activiley pump H+ across the membrane. Then FADH2 donates an e- to the second complex. Then NAD+ and FAD+ will return to glycolysis and Krebs cycle. Membrane potential happens,, the final e- acceptor is O. H+ diffuses thru ATP synthase, the ATP synthase spins, and an inorganic phosphate attaches to ADP to turn into ATP.