Cellular Respiration? Biology Homework...?

Question

Help me out...

1. what role do diffusion and osmosis play a role in cellular respiration?

2. explain the difference between anaerobic and aerobic phases of respiration and where each phase occurs.

3. what happens when co2 combines with water...

thank you...

Answer 1

1. Carbon dioxide diffuses out of the mitochondrion and out of the cell. Oxygen diffuses into the cell and mitochondrion. Water that is produced at the end of the electron transport chain diffuses out by osmosis (just a special kind of diffusion involving water traveling through membranes).
2. The anaerobic part is glycolysis. It happens in the cytoplasm and only produces a net gain of 2 ATP. It doesn't break down the glucose very much. If no oxygen is there, then glycolysis is followed by fermentation. If oxygen is present, then glycolysis is followed by aerobic respiration.

The aerobic phase can only continue if oxygen is present. It happens in the mitochondria. The molecules are broken down further during the transition phase and the Krebs or citric acid cycle, and the electrons from these processes are transferred to the electron transport chain. This is when the most ATP are made, up to 36 or 38ATP in the whole process, including glycolysis.

3. When CO2 combines with water it makes the water acidic because the carbon dioxide reacts chemically with some of the water molecules to make carbonic acid.

Answer 2

my bio teacher would kill me since i just learned this and i dont know like any of it. but i do know for part of number 2, anaerobic activity does not need oxygen and aerobic activity does .