2.8

Question 1

how does a cell produce its own atp and why is this process necessary?

Answer 1

• process is called respiration
• it produces atp from organic compounds
• this is done because atp is immediately usable as an energy source anywhere in the cell for any process

Question 2

state the 2 types of cell respiration

Answer 2

1. aerobic
2. anaerobic

Question 3

describe aerobic respiration

Answer 3

• with oxygen
• glucose + oxygen –> carbon dioxide + water
• c6h12o + o2 –> co2 + h2o
• lots of atp

Question 4

describe anaerobic respiration

Answer 4

• without oxygen
• humans: glucose –> lactate + carbon dioxide
• yeast: glucose –> ethanol + carbon dioxide
• little atp

Question 5

why might anaerobic respiration be better than aerobic respiration sometimes?

Answer 5

although anaerobic does not provide a lot of atp, it is very rapid and maximises the power of muscle contractions

Question 6

what is an instrument that can measure respiration?

Answer 6

respirometer

Question 7

how does the respirometer work?

Answer 7

1. 2 sealed containers: one with an organism and one without
2. both containers contian alkali balls to absorb co2 and prevent suffocation
3. they are connected via a capillary tube with water
   4.