Question

18. Where in the eukaryotic cell are the ATPs "recharged" in fermentation? What is the process called? 10. Where in the eukaryotic cell are ATPs "recharged in cell respiration? Name the four steps.

Answer 1

Question 1B.
• This process is called anaerobic respiration and occurs in cytoplasm of cell.
• Anaerobic respiration is the process of producing cellular energy without oxygen.
• Anaerobic respiration is a relatively rapid reaction and produces 2 ATP, which is very less than aerobic respiration.

Question 1C.
• Eukaryotic cells produce energy in presence of oxygen by the process called aerobic respiration.
This process is divided into four steps :-
1. Glycolysis - occurs in cytoplasm of cell.
In this stage Glucose is converted into pyruvate.

2. Link reaction - occurs in mitochondrial matrix.
In this stage pyruvate is oxidized into acetyl coA .

3. Krebs cycle - occurs in mitochondrial matrix.
Acetyl coA is oxidized and CO2 molecules released from this cycle.
In this cycle, NADH and FADH2 are produced.

4. Election transport chain - occurs at inner mitochondrial membrane.
In this stage energy from NADH and FADH2 is converted into form of ATPs.