Respiration Flashcards
(12 cards)
what are the stages of aerobic respiration
- glycolysis
- link reaction
- krebs cycle
- oxidative phosphorylation
outline glycolysis
- glucose is phosphorylated by adding 2 phosphates, making glucose more reactive
- 1-6 glucose biphosphate is formed and is then hydrolysed into 2 molecules of TP
- each molecule of TP is oxidised to pyruvate loosing its phosphates, which are used to form ATP, and reduces NAD to NADH
whats the products of glycolysis
2 pyruvates, 2 NADH and a net gain of 2 ATP
where does glycolysis happen
cytoplasm
where does the link reaction happen
mitochondrial matrix
outline the link reaction
- pyruvate us dehydrogenated and decarboxylated to from acetate
- NAD is reduced to NADH and Co2 is released
- acetate combines with coenzyme A to from AcetylCoA
what is the product of the link reaction
1 AcetylCoA, 1 NADH and 1 Co2
where does the krebs cycle take place
mitochondrial matrix
outline the krebs cycle
- a 4C compound, oxaloacetate, combines with acetylcoa to from nitrate
- citrate is decarboxylated and dehydrogenated into a 5C compound. In doing so, NAD is reduced to NADH.
- the 5C compound is again dehydrogenated and decarboxylated into a 4C compound. In doing so, NAD is reduced to NADH.
- the 4C compund is dehydrogenated a further 2 two times to produced FADH2 and NADH .
- ATP is produced from ADP and Pi
- oxaloacetate is regenerated
whats the product of the krebs cycle
3 NADH, 1 FADH2, 1 ATP and 1 co2
where does oxidative phosphorylation happen
mitochondria cristae