Hemoglobin is the pigment in red blood cells responsible for carrying oxygen
Coenzymes
Coenzymes are small organic molecules that, themselves, do not function as catalysts (i.e. enzymes) but aid the latter in carrying out their functions. Enzymes are biological catalysts, which means that they allow reactions to occur at lower activation energies. In a way, enzymes help to "speed up" chemical reactions.
Coenzymes are mostly derived from vitamins. Examples include TPP from Vitamin B1 (thiamine), FAD from Vitamin B2 (Riboflavin), and NAD+ from Niacin.
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Hippocampus is important for forming long term memories, while the Prefrontal cortex is responsible for memories retrieval.
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They use them so that they can see what type of organisms live there.
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