For anyone who was curious, a while back we talked about cellular respiration/energy production. A part of this process is called the Krebs Cycle, and a 4-carbon compound called oxaloacetic acid bonds with a product of a broken down glucose known as acetyl coenzyme A to make something called citric acid. In a nutshell, this 4 carbon compound is used in some cases of photosynthesis and he was like, “oh hey if you remember the name of this substance I’ll give you ten bucks” and ya girl remembered and he kept his word lmao