oxidative phosphorylation 12.3

Question 1

where does oxidative phosphorylation take place

Answer 1

cristae of the mitochondria

Question 2

why does oxidative phosphorylation take place in the cristae

Answer 2

there are enzymes and proteins present there that are necessary

Question 3

what is the first stage of oxidative phosphorylation

Answer 3

H atoms produced beforehand combine eoth NAD and FAD

Question 4

what is the second stage of oxidative phosphorylation

Answer 4

reduced NAD and FAD donate electrons of the hydrogen atoms they are carrying to the first molecule in the ETC

Question 5

what is the 3rd step of oxidative phosphorylation

Answer 5

electrons pass through the ETC as they pass the energy release causes active transport of protons across the mitochondrial membrane

Question 6

whats the 4th step of oxidative phosphorylation

Answer 6

the protons accumulate in the inter-membranal space before diffusing back into thr mitochondrial matrix

Question 7

what is the final step of oxidative phosphorylation

Answer 7

at the end of the chain the electrons combine with protons and oxygen to form water

Question 8

what role does oxygen play in oxidative phosphorylation

Answer 8

electron acceptor

Question 9

what else can be used for respiration apart from sugars

Answer 9

lipids and proteins

Question 10

what happens to lipids before they can be used in respiration

Answer 10

they are hydrolysed to glycerol and fatty acids

Question 11

how are proteins prepared to be used in respirstion

Answer 11

they are hydrolysed to their amino acids and then have their amino groups removed