3.3 respiration Flashcards
(36 cards)
what are the 4 stages of respiration?
glycolysis
link reaction
Krebs cycle
oxidative phosphorylation
where does glycolysis take place?
in the cytoplasm
in simple terms explain glycolysis
refer to sheet
what enzymes are used during an oxidation reaction?
dehydrogenase
what happens during an oxidation reaction?
NAD becomes NAD reduced
how many ATP’s per glucose are made during glycolysis?
why is this not equal to the net ATP?
4 - because 2 ATP’s are used at the start
how many NAD reduced per glucose are during glycolysis?
2
where does the link reaction take place?
in the mitochondrial matrix
what does the link reaction need to happen?
oxygen
in simple terms describe the process of the link reaction
refer to sheet
what enzymes are used in a decarboxylation reaction?
decarboxylase
what happens during a decarboxylation reaction?
specify to the link reaction
CO2 is removed
carbon is removed from pyruvate and joined with 2 oxygens
how many NAD reduced per glucose and CO2 is made during the link reaction?
2 of each
where does the Krebs cycle take place?
in the mitochondrial matrix
in simple terms explain the process of the Krebs cycle
refer to sheet
what happens to coenzyme A. during the Krebs cycle?
it’s released and reused in the link reaction to bring another acetate into the Krebs cycle
how many NAD reduced per glucose are made in the Krebs cycle?
6
how many FAD reduced per glucose are made in the Krebs cycle?
2
how many CO2’s per glucose are made in the Krebs cycle?
4
how many ATP’s per glucose are made in the Krebs cycle?
2
where does oxidative phosphorylation happen?
in the inner mitochondrial matrix
in simple terms explain the process of oxidative phosphorylation
refer to the sheet
what is the role of reduced NAD and reduced FAD in oxidative phosphorylation?
what happens to them?
brings H atoms into the inner mitochondrial membrane
they are re-oxidised to return to glycolysis, link reaction and the Krebs cycle
what does the active transport of H+ into the matrix produce?
give multiple names
electrochemical gradient
or proton/pH
