Dec 5, 2022
i miss steph
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i miss steph
"I keep a close watch on this heard of mine, I keep my eyes wide open all the time, I keep the ends out for the tie that binds, Because you're mine, I walk the line~"
It felt like it'd been forever since he'd played guitar. He was a bit out of practice, but it was a nice to pick it back up again.
I think I'm the only one in this class who ever does any homework when we go to the computer lab...
Oh hey Quentin sent me a link.
What did glycerol look like again?
"Okay, so!" Evan sat down with his note cards spread over the table, ready to study.
"Maltose consists of two Glycogens. It's the one that looks like they're holding hands. Um, it comes in plant sugars and grains.
Dehydration synthesis, or condensation, is a reaction that produces water and maltose, and it takes place between two Glucose molecules. It's the only one that has a plus in between the molecules..." He said, turning over the notecard to look at the diagram.
"The Cellulose molecule is a polymer of glucose molecules attached by indigestible beta bonds. It's an important carbohydrate for structure and is the primary component found in the cell walls of plants. It sort of looks like...three molecules dancing together. Or stairs?" He shrugged and moved on. "The Nitrogen Base, component of nucleotides and nucleic acids. NH2-C-CH=CH=NH-C-N=C, which is -to the NH2...oh, and there's an O double bonded to the NH-C-N....Alright, okay, committed to memory. Got it. Moving on."
He tilted his head at the next card, which had three carbons connected to OH and...something else, he couldn't make out the sloppy print. They were either Rs or Hs. "Oh, Glycerol. Right, three carbons attached to hydroxyl functional groups and hydrogen atoms." They were apparently Hs.
"Fructose, carbohydrate monosaccaride, characterized by hydroxyl functional groups and a keytone functional group...Keytones, those have carbons double bonded to an Oxygen, right? I think so." He looked over at his notebook to confirm this, but the print out was messy and he couldn't tell. The line was thicker, so here's to assuming it was a double bond! "Isomer of glucose and galactose. Not to be confused with Galactus the eater of planets. Isomers are the same number of atoms, but have different arrangements." The model sort of looked like a spine of carbons. It wasn't so different from Glycerol, actually.
"The monosaccharide galactose is characterized by aldehyde functional group. Soo...that means, Carbon, single bonded to a Hydrogen and double bonded to an Oxygen." He was so going to fail the test tomorrow. How could he remember all of these combinations!?? "Is the isomer of glucose and Fructose. C6H12O6. Looks a lot like Fructose, except for the aldehyde up top. Okay, maybe I can remember that....Hopefully..."
Gaahhhhh.
"Next up is amino acid. Okay, 'this one has a non-polar side chain, or R group. It'll fold to the inside of any polypeptide it is a part of'." He raised an eyebrow, looking on the flip side to the model. CH3-S-CH2-CH2-C, which then split off to H3N+ and C, which was double bonded to one Oxygen, and single bonded to a negatively charged Oxygen. There was also a Hydrogen single bonded to the first Carbon.
Then there were the steroids. "Non-polar lipids. Characterized by four attached Carbon rings." He turned it over. They sort of looked like those little crackers you eat with clam chowder--no, Evan, stop thinking about food and get back to studying. "Steroids include sex hormones, cortisone, and cholesterol."
"Sucrose is an energy source and an important transport molecule in plants. It is composed of a glucose and fructose molecule." From the diagram, it sort of looked like a pulley system. Easy enough to remember--the structures themselves he could probably remember, but since it was tomorrow, he just opted for trying to associate them with certain pictures in his mind.
"Glucose comes in a ring, another important energy source, and is an important transport molecule in animals."
"Lactose is a disaccharide/energy source. Beta glycosidic bond formed from galactose and glucose monomers." He turned it over to see the structure and furrowed his brow. "Okay, so this one looks like they're holding hands, too...but it's different than Maltose because the bonds connecting the Oxygen in the middle aren't bent." Maybe it had something to do with the H and OH being in different places on the molecules. In any case, Lactose was now going to be associated with one molecule flying away with another molecule. Or maybe trying to help it up to somewhere.
"Saturated fatty acid..." that had such a long chain of unsubstituted carbons, it actually did look like a spine. "Non-polar, with a carboxyl group at the top."
"The Phospholipid molecule is a lipid and is a component of cell membranes." This one should be easy to remember. There were two "legs", one of which was bent. Sort of like dancing pantyhose made up of CHsomenumberorothers.
And finally, for the last of his notecards--the Starch molecule, a storage carbohydrate. "Polymer of glucose subunits. Digestible alpha bonds--the bonds are called glycosidic." He turned it over and chuckled. Lots of molecules holding hands. Okay, easy to remember.
With those done, he set the cards down structures-side up and began testing himself. The one with the + was dehydration synthesis. The pulley system....sucrose. System, sucrose. Both had S's. Commit to memory. Hippie hand holding molecules were Starch, and the one pulling the other up was lactose. The dancing pantyhose were a phospholipid molecule, and the super long spine with the carboxyl group on top was a saturated fatty acid. The ones that reminded him of crackers--though now looking at it, it sort of looked like a cell wall or something, was a steroid. The stairs were the actual cellulose molecule, though. Nitrogen base was the sort of complicated looking one. The longish spine with the aldehyde group was just a monosaccharide. The similar spine was Fructose. The smaller spine was glycerol, the tree was an amino acid, and glucose was the simple-ish sort of one.
"Okay. Now on to R groups...."
He was going to forget all of this once the test was in front of him, he was sure. Uhg.