Oxidative Phosphorylation

Question 1

Describe the Electron Transfer Chain

Answer 1

Reduced NAD/FAD donate e − of Hydrogen to the first molecule in the Electron Transport Chain

e − passed along the chain in oxidation-reduction reactions. The energy they release causes the active transport of p+ across the inner mitochondrial membrane

p+ accumulate here b4 diffusing back into matrix via ATP Synthase in membrane

end of chain e- + h+ + O ➜ H2O
oxygen is the terminal acceptor

Question 2

1 molecule of NAD produces how many ATP?

Answer 2

3

Question 3

1 molecule of FAD produces how many ATP?

Answer 3

2

Question 4

As greater energy would be lost if ETC was just one step. What actually occurs?

Answer 4

e- passed along e- transfer carrier molecules each at a slightly lower enegyer level. hence the e- move down an energy gradient

Question 5

Apart from glucose, what else can be used as a respiratory substance?

Answer 5

Lipid and Proteins

Question 6

How are lipids used as a respiratory substance ?

Answer 6

Lipid hydrolysed into glycerol and fatty acid
Glycerol phosphorylated and converted to triose phosphate
fatty acid convert to acetyle co enzyme A

Question 7

How are proteins used as a respiratory substance ?

Answer 7

Proteins are broken down into amino acids
deamination occurs when the NH2 is removed
The molecules join the pathways depending on the no of carbons

Question 8

In anaerobic conditions what can’t occur?

Answer 8

Krebs or ETC

Question 9

What is the equation for anerobic respiration in plants/microrganisms?

Answer 9

Pyruvate + reduced NAD ➜ ethanol + CO2+ oxidised NAD

Question 10

What is the equation for anerobic respiration in animals?

Answer 10

Pyruvate + reduced NAD ➜ lactate + oxidised NAD