Cellular Respiration: Key Processes and ATP Production

This video provides an overview of cellular respiration, a process by which cells break down glucose to produce ATP. It covers the three main steps: glycolysis, the Krebs cycle, and oxidative phosphorylation. Glycolysis occurs in the cytosol, producing a net gain of 2 ATP. The Krebs cycle takes place in the mitochondria, generating 6 NADH, 2 FADH2, and 2 ATP. Finally, oxidative phosphorylation uses NADH and FADH2 to produce a total of approximately 32 ATP. The video also mentions the theoretical yield of 38 ATP and promotes Magoosh test prep services.

What is the primary purpose of cellular respiration?

• To create oxygen

• To produce glucose

• To generate ATP

• To break down proteins

Which of the following is NOT a main step in cellular respiration?

• Glycolysis

• Krebs Cycle

• Electron Transport Chain

• Calvin Cycle

Where does glycolysis take place?

• Endoplasmic Reticulum

• Nucleus

• Mitochondria

• Cytosol

What are the net products of glycolysis?

• 4 ATP, 2 NADH, 2 Pyruvate

• 2 ATP, 2 NADH, 2 Pyruvate

• 2 ATP, 4 NADH, 2 Pyruvate

• 4 ATP, 4 NADH, 2 Pyruvate

What molecule is produced during pyruvate oxidation?

• Lactic Acid

• GTP

• FADH2

• Acetyl CoA

How many NADH molecules are produced in the Krebs cycle per glucose molecule?

• 3

• 6

• 9

• 12

What is the role of ATP synthase in the electron transport chain?

• To transport electrons

• To create a hydrogen ion gradient

• To synthesize ATP

• To break down glucose

How many ATP molecules are produced from each NADH in the electron transport chain?

• 1.5

• 2

• 1

• 2.5

What is the total ATP yield from one glucose molecule under optimal conditions?

• 34

• 32

• 28

• 30

What is the theoretical maximum yield of ATP from one glucose molecule?

• 36

• 38

• 32

• 30