Aerobic respiration, as opposed to anaerobic respiration, occurs in the presence of oxygen, accounts for most respiration that takes place, and produced up to 15 times more ATP molecules.
Its overall reaction is:
glucose + oxygen –> carbon dioxide + water + heat energy
You can notice that it is essentially the reverse of photosynthesis. Of course not all organisms obtain their respiration substrate (e.g. glucose/food) by making it themselves as plants do, yet all carry out respiration. Don’t make the mistake of associating plants with photosynthesis, and non-plants with respiration. They are different processes. Plants photosynthesise and respire at the same time, we eat plants and respire at the same time.
Similarly, don’t confuse respiration with ventilation. In the context of biology, ventilation is the movement of air through our respiratory system i.e. breathing, while respiration is the process by which our cells produce energy (ATP).
Now that we’ve got that out of the way, let’s delve right into the painful details of aerobic respiration. Just kidding, you know I’ll make it a walk in the park!
There are 3 main stages of aerobic respiration:
1. Glycolysis that takes place in the cytoplasm
2. The citric acid (Krebs) cycle that takes place in the mitochondria
3. Oxidative phosphorylation that takes place in the mitochondria
Thank you for the help, your website and videos are awesome
pika mart YouTube
Hi! I have recently finished my first year doing biology at uni and I subscribed to you back when I was doing AQA A levels (glad I don’t live in Wales after watching this vid lol) and you and your website helped me so much. Just wanted to say it’s so nice to see you
Mr Peanutbutter YouTube
Thank you!! Your site is so helpful!
I got A* in A-level biology (Cambridge), thanks! I love your videos
Sherif Negm Facebook
OMG them videos are great! You're a goldmine - and I'm a gold digger ;)