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Biology
Metabolism
| Term | Definition |
|---|---|
| metabolism | sum of all chemical reactions |
| catabolic reactions | break apart molecules and bonds; energy released |
| anabolic reactions | make molecules, and forms bonds; energy is used |
| cellular respiration | catabolic reaction example |
| protein synthesis, photosynthesis | anabolic reactions example |
| enzymes | proteins that speed up chemical reactions |
| enzymes bind to substrates at a designated spot (active site) reducing the activation energy required for the reaction to begin | how do enzymes work |
| the substrate has to fit the enzyme perfectly at the active site, almost like a "lock and key" which can help prevent unwanted side reactions making it more precise | how and why do enzymes react with a specific substrate |
| temperature pH | What affects the activity of an enzyme? |
| coenzymes | organic molecules that bind to enzymes to help carry electrons and hydrogens |
| through enzymatic competition, competitive inhibition, and. negative feedback inhibition | how are biochemical pathways regulated? |
| enzymatic competition | enzymes are competing for same substrate molecule |
| competitive inhibition | enzyme inhibitors block access to active cite; multiple substrate |
| negative feedback inhibition | end product binds to enzyme, changing its shape; common in metabolic pathways |
| oxidation reduction | occurs simultaneously; electron transport train is series of membrane proteins participating in sequential, linked reactions |