What do you need help with sir??
The Krebs cycle<span> occurs right after glycolysis. The substance that begins the </span>Krebs cycle<span> is a 3-carbon molecule called pyruvic </span>acid<span>. The process breaks down the pyruvic </span>acid<span> into acetyl coenzyme A, releasing one of the carbon atoms into carbon dioxide.
hope it help</span>
Well, put simply, biology is the study of life. Everything living is organic (everything living decomposes). Biologists study living things which have organic chemistry.
No it couldn't happen as cellular respiration brake down glucose by the help of O2 to form ATP and co2 while this Glucose was first synthesized by the photosynthesis process without it there wouldn't have been any glucose for cellular respiration to take place