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MCAT Organic Chemistry 2

Subjects : mcat, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. (+) and (-) describe what?






2. (R) and (S) describe what?






3. 3 carbon triol that forms backbone of triacylglycerol






4. What kind of lipids compromise the lipid bilayer?






5. Glycosidic linkage of maltose






6. Energy storage molecule of carbohydrates for animals






7. Adjacent polypeptide strands running in opposite directions in Beta pleated sheet structure






8. D and L describe what?






9. Name for 6 membered ring






10. 1. it exists in solution in equilibrium with linear form 2. mutarotation occurs readily 3. it is a reducing sugar - and reacts positively w/ Benedict's reagent






11. Fatty acid structure






12. What describes the affinity of functional groups for a proton?






13. Epimers of sugars that vary in the configuration of their anomeric carbons






14. Name for 5 membered ring






15. Carbon that in linear form has a carbonyl - or in cyclic form has a hemiacetal or an acetal






16. Separation is due to charge - with negative charge moving toward positive electrode and positive charge moving toward negative electrode






17. Fatty acid w/ no double bonds and maximum number of hydrogens






18. Molecules with the same atoms - but different bonds






19. Property of fatty acids where one end is hydrophobic and the other is hydrophilic






20. Histidine






21. Right handed helix w/ carboxyl of one amino acid bound to the amine of another amino acid three residues away - proline never resides in this structure b/c it would place a kink in the helix






22. 2 reasons why fats have more efficient energy stores than carbs






23. Glycosidic linkage of cellulose






24. Physiological pH






25. Molecule can act as a base and as an acid






26. The amino acid sequence of a protein that is determined by peptide bond






27. What configuration do all naturally occuring amino acids have?






28. Interconversion btw two anomers






29. Glycosidic linkage of sucrose






30. Nonpolar - hydrophobic amino acids






31. Storage form of fatty acid that is composed of 3 esterified fatty acid to a glycerol molecule






32. Unique feature of cysteine






33. Glyceraldehyde






34. Sugar with a carbonyl group at the 2 carbon position






35. What stabilizes lipid bilayer?






36. Covalent bond formed btw carboxyl group of one atom and the amino group of another amino acid in an addition - elimination mechanism - enzymes are required to carry out rxn






37. Molecules with the same atoms and same bonds - but different bond geometries; can either be enantiomers or diastereomers






38. Macromolecule that performs a variety of bodily functions and is composed of up to 20 different amino acids






39. Initial folding of proteins into shapes stabilized by H bonds btw amino and carboxyl groups of backbone






40. 3 physiological roles of lipids






41. Sugar with an aldehyde at the first carbon position






42. Diastereomers that vary in the configuration of 1 chiral center






43. Acidic amino acids






44. Basic amino acids






45. Characteristics of hydrophobic amino acids






46. Adjacent polypeptide strands running in the same direction in Beta pleated sheet structure






47. 1. it requires an enzyme to linearize and mutarotate 2. it is not a reducing sugar and give negative Benedict's test






48. Generated btw either thiols on different proteins or thiols on the same protein






49. Enzyme that hydrolyzes maltose into 2 glucose molecules?






50. Fatty acid w/ one or more double bonds in cis form predominately