Cellular Respiration

Question 1

Anaerobic Respiration/ Fermentation
(animal)

Answer 1

• Glycolysis only due to no oxygen being present

Animais: glucose → lactic acid + 2 ATP

Question 2

Anaerobic Fermentation/ Respiration
(plants)

Answer 2

• Glycolysis only due to no oxygen being present

Yeast: glucose → ethanol + CO2 + 2ATP

Question 3

Glycolysis

Answer 3

1. Glycolysis occurs in the cytosol where one glucose molecule is broken down into 2ATP, NADH and pyruvate
2. Pyruvate molecules cross into the mitochondrial matric where it is converted into Acetyl CoA
   before entering Krebs cycle

Question 4

The Krebs Cycle

Answer 4

3. Krebs cycle consists of a series of enzymatic reactions that ultimately load NADH and FADH2 and generate 2ATP

Question 5

Electron Transport Chain

Answer 5

4. NADH and FADH2 enter the electron transport chain in the mitochondrial cristae where they donate their H+ ions and electrons
5. The electrons pass along the electron transport chain and are ultimately accepted by oxygen which then combines with H+ to form water
6. The H+ ions accumulate in the intermembrane space and are pumped back across the cristae via ATP synthase, which catalyses the formation of 26 to 28 ATP from ADP and Pi

Question 6

Overall Aerobic Respiration Equation

Answer 6

glucose + oxygen → water + carbon dioxide + 30 to 32 ATP

Question 7

Where does the Krebs Cycle Occur?

Answer 7

Matrix of the mitochondria

Question 8

Where does the Electron Transport Chain Occur?

Answer 8

Cristaes