Electron Transport chain

Question 1

What is the ETC?

Answer 1

Part of the 4th step of aerobic cell resp

Question 2

What is the ETC made of?

Answer 2

Mitochondrial inner-membrane proteins (proteins in inner membrane of mitochondria)

Question 3

What is inside the inner mitochondrial membrane?

Answer 3

Inner mitochondrial matrix

Question 4

Where is the energy being used to power ETC coming from?

Answer 4

Electrons being carried by NADH and FADH2 in a series of redox reactions

Question 5

What is the end result of the ETC?

Answer 5

Using energy from the e- to generate an H gradient by pumping protons (H+) into the intermembrane space

Question 6

What gets put into the ETC? What happens to these reactants?

Answer 6

NADH and FADH2 drop off e- into ETC, get oxidized into NAD+ and FADH

Question 7

In a sentence, what happens in the ETC?

Answer 7

Electrons get passed from protein to protein from NADH and FADH2, and the energy from these redox reactions (proteins gaining and losing electrons) makes an H ion concentration gradient in the intermembrane space. The electrons get passed to the final e- acceptor, O2, which makes water.

Question 8

What is the final e- acceptor?

Answer 8

O2

Question 9

What happens when O2 binds to e-?

Answer 9

It interacts with H+ to form water as a byproduct of cell resp.

Question 10

How does the ETC help chemiosmosis?

Answer 10

ETC builds hydrogen ion gradient, which chemiosmosis uses