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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. (R) and (S) describe what?






2. Basic amino acids






3. Polar amino acids






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






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






6. 3 carbon triol that forms backbone of triacylglycerol






7. Acidic amino acids






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






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






10. Interaction btw polypeptide subunits arranged in polypeptide. can be covalent bonds or intermolecular forces - disulfide bond that does not form btw residues on the same protein affect (blank)






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






12. Fatty acid structure






13. 1.has partial double bond character due to resonance 2. it cannot rotate 3. amide H is someWhat acidic and can H bond






14. Name for 6 membered ring






15. Histidine






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






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






18. 3 physiological roles of lipids






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






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






21. PH at which the amino acid has a net neutral charge






22. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






23. Name for 5 membered ring






24. Energy storage molecule of carbohydrates for plants






25. Characteristic of basic amino acids






26. Enzyme that hydrolyzes maltose into 2 glucose molecules?






27. 2 covalent bonds formed in proteins






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






29. Hydrophobic and hydrophilic interactions btw amino acids more distant from each other on the polypeptide chain






30. What stabilizes lipid bilayer?






31. Sugar with an aldehyde at the first carbon position






32. Fxn of cholesterol in the membrane?






33. 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






34. Structure where H bonds occur btw residues distant from each other - or on a separate chain. backbone is extended rather than coiled






35. Unique feature of cysteine






36. What kind of lipids compromise the lipid bilayer?






37. 2 reasons why fats have more efficient energy stores than carbs






38. Glyceraldehyde






39. (+) and (-) describe what?






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






41. Glycosidic linkage of maltose






42. Hydrolysis






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






44. Amino group placed on the left of a fischer projection is a?






45. Physiological pH






46. Enzyme that hydrolyzes lactose into galactose and glucose into






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






48. Hydrophilic amino acids






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






50. Naturally occurring carbohydrates are formed from what?