Respiration Tips Flashcards
1
Q
Why does oxygen concentration decrease in a cell?
A
oxygen is being taken up as the final electron acceptor in the ETC during oxidative phosphorylation
2
Q
What causes the electron transport chain to start?
A
reduced coenzymes NAD and FAD releasing hydrogen (which splits into proton and electron) into the mitochondrial matrix
3
Q
What does cyanide do to respiration?
A
- inhibits cytochromes which are carrier proteins involved in the ETC
- this inhibits the ETC and thus oxidative phosphorylation
- oxygen concentration will stay the same because no more O2 being taken up as a final electron acceptor
4
Q
in a centrifuge the…
A
heaviest go to the bottom (nuclei and chloroplasts)
5
Q
Why might the RQ value not be 1 even if glucose is being respired?
A
anaerobic and aerobic respiration is occurring so more carbon dioxide is produced than oxygen taken up (because only aerobic takes up oxygen)
6
Q
After which speed in centrifugation will mitochondria be ready to collect?
A
after medium speed
