Respiration Flashcards
1
Q
What is respiration?
A
The process of transferring energy from glucose, which happens constantly in every living cell.
2
Q
What is the equation for aerobic respiration?
A
C6H12O6 + 6O2 ———> 6CO2 + 6H2O
3
Q
What is the equation for anaerobic respiration in plants?
A
glucose ——-→ ethanol + carbon dioxide (+ energy)
4
Q
What is the equation for anaerobic respiration in animals?
A
glucose ——–→ lactic acid (+energy)
5
Q
Describe the differences between aerobic and anaerobic respiration
A
AEROBIC:
- With oxygen
- Produces lots of ATP
ANAEROBIC:
- Without oxygen
- Not a lot of ATP
6
Q
PRACTICAL: Investigate the evolution of carbon dioxide from respiring seeds or other suitable living organisms.
A
- Soak some dried beans in water for a day or two. They will start to germinate, and respire.
- Boil a similar sized, second batch of dried beans. This will kill them and make sure they can’t respire. The dead beans act as a control.
- Put the same amount of hydrogen-carbonate indicator into the two test tubes.
- Place a platform made of gauze into each test tube and place the beans on this.
- Seal the test tubes with a rubber bung
- Leave the apparatus for a set period of time (eg: an hour)
- During that time, the CO2 produced by the germinating beans should have had an effect on the hydrogen-carbonate indicator - it will have turned yellow.
7
Q
PRACTICAL: Investigate the evolution of heat from respiring seeds or other suitable living organisms.
A
- Prepare 2 sets of beans
- Add each set of beans to a vacuum flask, making sure there’s some air left in the flasks (so the beans can respire aerobically)
- Place a thermometer into each flask and seal the top with cotton wool
- Record the temperature of each flask daily for a week
- Repeats should be carried out, using the same mass of beans each time
- The beans are well-insulated in the flasks, so. when the germinating beans respire, the test flask’s temperature will increase compared to the control flask.
