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CHAINS By Arthur W. Siebens, Ph.D. Chorus to the tune of “Chains” by the Beatles Chains-biology is all full of chains But they ain’t the kind, that you can see No, to see these chains takes electron microscopy Chains-polymers is what we call chemical chains Chains made of monomers – chemical links If your brain weren’t made with polymers you couldn’t think. Starch-starch is just a chemical chain Chains made of glucose, a thousand links long Repeat the same old bond, never get it wrong. Now plants store glucose as starch-think they’re cool You eat the starch, digest ityour small intestine ain’t no fool. Now you’re back to glucose, you burn it if you please If not your liver stores it as glycogen, for your future needs ‘Course glycogen’s a chain (CHORUS) biology is all full of chains But they ain’t the kind, that you can see No, to see these chains takes electron microscopy. Protein-protein’s another chemical chain Made of amino acids, a thousand links long Repeat that peptide bond, never get it wrong. Now when you eat protein from meat or baked beans Your small intestine digests it to amino acids-the building blocks you need Then your muscle cells use them to make you strong like Arnold So remember next time you flex, that bulge that makes your shirt rip is made of Chains-biology is all full of chains But they ain’t the kind, that you can see No, to see these chains takes electron microscopy. DNA and other nucleic acids are just giant chains Chains of nucleotides, a thousand links long Repeat the same old bond, never get it wrong. Now like the others DNA’s digested in your GI tract, Oh yeah Then your cells can make what used to code for peanuts Code for you, in fact. With similar nucleotides you can also make RNA It’s flexible, there’s no waste, your cells make what they need that day. But they usually make Chains-biology is all full of chains But they ain’t the kind, that you can see No, to see these chains takes electron microscopy. Lipids-lipids are usually short kinds of chains Chains of fatty acids, just three links long Attached to glycerol, never get it wrong. Now, distinguishing triglycerides don’t take much toil, no, no If it’s a solid at room temp it’s a fat, if it’s a liquid it’s an oil In any case lipids don’t dissolve in H2O ‘Course waxes and steroids are also lipids, but they’re harder to know ‘Cause they’re not Chains-biology is all full of chains But they ain’t the kind, that you can see No, to see these chains takes electron microscopy. Yes, to see these chains takes electron microscopy!