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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. PH at which positive and negative charges balance to form a zwitterion






2. 3 carbon triol that forms backbone of triacylglycerol






3. Formula for urea






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






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






6. Sulfur containing amino acids






7. Unique feature of glycine






8. Acetic acid formula?






9. Glycosidic linkage of sucrose






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






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






12. Physiological pH






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






14. 2 covalent bonds formed in proteins






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






16. Hydrophilic amino acids






17. 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






18. Enzyme that hydrolyzes lactose into galactose and glucose into






19. Glyceraldehyde






20. Hydrolysis






21. D and L describe what?






22. Basic amino acids






23. Interconversion btw two anomers






24. Sugar with an aldehyde at the first carbon position






25. 3 physiological roles of lipids






26. Energy storage molecule of carbohydrates for animals






27. 2 reasons why fats have more efficient energy stores than carbs






28. Characteristics of hydrophobic amino acids






29. Molecules with the same atoms - but different bonds






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






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






32. Histidine






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






34. 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)






35. Glycosidic linkage of maltose






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






37. 4 causes of denaturation of proteins






38. Enzymes that hydrolyze fats






39. Nonpolar - hydrophobic amino acids






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






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






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






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






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






45. What stabilizes lipid bilayer?






46. Glycosidic linkage of cellulose






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






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






49. 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






50. Enzyme that hydrolyzes maltose into 2 glucose molecules?