Anaerobic Cellular Respiration

Question 1

Why do we need anaerobic cellular respiration?

Answer 1

In the absence of enough O2, the ETC does not work, therefore needing another way to create ATP

Question 2

What mechanism is used to make ATP in anaerobic cellular respiration?

Answer 2

anaerobic cr uses substrate-level phosphorylation in glycolysis - NADH is oxidized so it can be used in glycolysis again since the etc is not functioning and glycolysis needs NAD+ continually.

Question 3

Describe ethanol fermentation/alcohol fermentation (reactants, intermediate molecules that oxidize NADH and products)

Answer 3

Step 1: Pyruvate (3Cs) is converted into acetaldehyde (2Cs)
Step 2: NADH is oxidized while turning acetaldehyde into ethanol
Final Products: CO2, ethanol, 2ATP (from glycolysis)

Question 4

Describe lactic acid fermentation (reactants, intermediate molecules that oxidize NADH and products)

Answer 4

NADH is oxidized by converting Pyruvate straight to lactic acid
Final Products: lactic acid, 2 ATP (from glycolysis)

Question 5

Where does fermentation occur in the cell?

Answer 5

cytoplasm