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Hello, and welcome to my YouTube channel! Today, I will be talking about cellular respiration!
Cellular respiration is an aerobic process, meaning that it needs energy to take place. Glycolysis, the first step of cellular respiration, is anaerobic, meaning that oxygen is not needed.
First, cellular respiration is a process that releases chemical energy from sugars and other carbon based molecules to make ATP when oxygen is present. This takes place in the mitochondria of our cells.
The 3-carbon based molecules from glycolysis enter respiration in the mitochondria's matrix. This process is called the Krebs cycle. Here ATP molecules are made and carbon dioxide is given off as a waste product.
Glycolysis splits glucose into 2 3-carbon molecules and makes 2 molecules of ATP.
The energy is transferred to a chain of proteins in the inner membrane of the mitochondria. Here a large number of ATP molecules are made.
Energy-carrying molecules then transfer energy to stage 2, the electron transport chain.
Oxygen then enters the process and is used to make water molecules. Water and heat are then given off as waste products.
Cellular respiration is an aerobic process. When oxygen isn't available, the anaerobic process of fermentation occurs.
In fermentation, pyruvate and NADH from glycolysis enters. 2 NADH molecules provide energy to convert pyruvate into lactic acid. As the NADH is used, it is converted back into NAD+. 2 molecules of NAD+ are then recycled back to glycolysis.
I hope that this video has helped some of you. If you have any questions please comment them below. Bye!
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