Electron is donated to the mitochondrial ETC at the lowest energy level by:

1.	Glucose	2.	NADH
3.	ATP	4.	FADH2

The source of oxygen for the synthesis of water in oxidative phosphorylation is:
1. carbon dioxide
2. glucose
3. molecular oxygen
4. pyruvate

When electron pass downhill in the ETC, the energy released is used to pump protons into:
1. matrix of mitochondria
2. cytosol
3. mitochondrial inner membrane
4. mitochondrial intermembrane space

ATP synthesis during oxidative phosphorylation in mitochondria is directly driven by:
1. oxidation of glucose.
2. electron transport downhill in the ETC.
3. terminal transfer of electrons to oxygen.
4. chemiosmosis.

ATP synthase is located in the mitochondrial:

Isolated inner membrane of mitochondria can carry out:
1. the citric acid cycle
2. oxidative phosphorylation
3. glycolysis and fermentation
4. reduction of ${\mathrm{NAD}}^{+}$

The number of oxygen molecules required each time a molecule of glucose is completely oxidized via aerobic respiration is:

Let us say there are 30 NADH and 12 ${\mathrm{FADH}}_2$ in a mitochondrion. What is the maximum number of ATP generated if all dinucleotides are used in chemiosmosis?

Identify the incorrectly matched pair:

The correct chronological sequence of the stages of the glycolytic pathway is: