Respiration Flashcards
1
Q
For the first 10 minutes, the tap attached to tube A was left open and the syringe from tube B was removed.
Suggest three reasons why the apparatus was left for 10 minutes.
A
Equilibrium reached.
Accept equilibrate
Allow for expansion / pressure change in apparatus; Allow respiration rate of seeds to stabilise
2
Q
Suggest and explain why the chosen temperature was 20 °C for this experiment
A
Optimum temperature / temperature for normal growth of seeds; (Optimum temperature) for enzymes involved in respiration.
3
Q
During the experiment, the coloured liquid in the tubing moved towards tube B.
A
Oxygen taken up / used by seeds;
CO2 given out is absorbed by KOH (solution); Volume / pressure (in B) decreases.
