Question

1. What is the byproduct of anaerobic respiration in yeast?

2. What is the byproduct of anaerobic respiration in humans?

3. What is the byproduct of aerobic respiration?

4. Describe the relationship between NADH, FADH2, and ATP.

5. How many molecules of ATP are formed from one molecule of glucose via glycolysis, Krebs Cycle AND the electron transport chain?

Answer 1

Hi Answer:

1. What is the by-product of anaerobic respiration in yeast?

Answer: the respiration process which is carried out in the absence of oxygen is called anaerobic respiration. In case of yeast, respiration takes place by two methods i.e. first in aerobic known as glycolysis (aerobic respiration) where glucose is being converted into pyruvate this process yields two molecules of ATP and the second is Fermentation (anaerobic respiration) where pyruvate is being converted into ethanol which releases carbon dioxide. So we can say that the product of anaerobic respiration in yeast is carbon dioxide, ethanol and 2 molecules of ATP.

2. What is the by-product of anaerobic respiration in humans?

Answer: In case of human beings the anaerobic respiration takes place in the muscle. The product of anaerobic respiration in human is adenosine triphosphate (ATP), carbon dioxide and lactic acid.

3. What is the by-product of aerobic respiration?

Answer: The process of respiration which took place in the presence of oxygen is known as aerobic respiration. In aerobic respiration organism convert, biochemical energy from nutrition into adenosine triphosphate (ATP) and the waste product are released. The glycolysis is the aerobic type of respiration which took place in the cytoplasm of the cell and it yields 2 molecules of ATP.

4. Describe the relationship between NADH, FADH2, and ATP.

Answer: The NADH and FADH2 both are cofactors of oxidoreductase enzymes having different redox potential as well as different electrochemistry. Nature of FAD cofactor is bound type whereas the NAD is a diffuse type of cofactor. They are acting as reducing powers in the process of reparation whereas the ATP is totally different it acts as the energy source and formed by the addition of a phosphate group to the ADP molecule.

5. How many molecules of ATP are formed from one molecule of glucose via glycolysis, Krebs cycle, AND the electron transport chain?

Answer: Glycolysis produces 2 molecules of ATP, 2 molecules of pyruvate and 2 molecules of NADH.

Krebs cycle produces 2 molecules of ATP, 8 NADH and 2 FADH2 and two pyruvate molecules.

Electron transport chain produces 32 molecules of ATP.

In aerobic respiration of a glucose molecule totally produce 36 ATP molecule (2 in glycolysis + 2 in Kreb cycle + 32 in Electron transport Chain).