Respiration Flashcards
1
Q
what are the stages of aerobic respiration
A
- glycolysis
- link reaction
- krebs cycle
- oxidative phosphorylation
2
Q
outline glycolysis
A
- 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
3
Q
whats the products of glycolysis
A
2 pyruvates, 2 NADH and a net gain of 2 ATP
4
Q
where does glycolysis happen
A
cytoplasm
5
Q
where does the link reaction happen
A
mitochondrial matrix
6
Q
outline the link reaction
A
- 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
7
Q
what is the product of the link reaction
A
1 AcetylCoA, 1 NADH and 1 Co2
8
Q
where does the krebs cycle take place
A
mitochondrial matrix
9
Q
outline the krebs cycle
A
- 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
10
Q
whats the product of the krebs cycle
A
3 NADH, 1 FADH2, 1 ATP and 1 co2
11
Q
where does oxidative phosphorylation happen
A
mitochondria cristae
12
Q
A
