Question

1. Pyruvate oxidation yields one molecule of _____ , and one molecule of ________ , which is exhaled.

2. How many molecules of CO2, ATP, NADH, and FADH2 does the citric acid cycle yield for each acetyl CoA molecule oxidized?
   1. CO2            

2. ATP       

3. NADH    

4. FADH2    

3. Identify the two molecules that provide the electron transport chain with high energy electrons._______ and _______.

4. The chemiosmotic flow of H+ ions across the inner mitochondrial membrane goes through an enzyme called                                                                          .

5. List aerobic stages of cellular respiration:                                                                                  

6. As a result of fermentation, animal cells produce _________ acid.

7. Define oxidation and reduction.

Answer 1

Ans-1.) Pyruvate oxidation yields one molecule of NADH , and one molecule of CO2 , which is exhaled.

*During Citric acid cycle : 2 molecules of CO2 . 1 molecule of ATP. 1 molecule of FADH2. 3 molecule of NADH.   are produced.

* Two molecules that provide the electron transport chain with high energy electrons NADH and FADH2.

* The chemiosmotic flow of H+ ions across the inner mitochondrial membrane goes through an enzyme called ATP SYNTHASE.

* Aerobic stages of cellular respiration : Oxidative Phosphorylation or Electron Transport chain only, uses the oxygen as final electron acceptor. Transfer of electrons from Complex IV (Cytochrome a/a 3) to oxygen, involves the use of oxygen.

* As a result of fermentation, animal cells produce Lactic acid.

* Oxidation : Process involving the loss of electrons , removal of hydrogen or addition of oxygen .

* Reduction : Process involving the gain of electrons, addition of hydrogen or removal of oxygen.