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






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






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






4. Acetic acid formula?






5. Fatty acid structure






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






7. Physiological pH






8. Formula for urea






9. Fxn of cholesterol in the membrane?






10. 2 reasons why fats have more efficient energy stores than carbs






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






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






13. Sulfur containing amino acids






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






15. Name for 6 membered ring






16. Enzyme that hydrolyzes lactose into galactose and glucose into






17. Glycosidic linkage of sucrose






18. Hydrolysis






19. What kind of lipids compromise the lipid bilayer?






20. 3 carbon triol that forms backbone of triacylglycerol






21. Characteristic of basic amino acids






22. Sugar with an aldehyde at the first carbon position






23. 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






24. 4 causes of denaturation of proteins






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






26. Characteristics of polar amino acids






27. Glyceraldehyde






28. 3 physiological roles of lipids






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






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






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






32. What stabilizes lipid bilayer?






33. Interconversion btw two anomers






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






35. Nonpolar - hydrophobic amino acids






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






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






38. Glycosidic linkage of lactose






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






40. Polar amino acids






41. 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)






42. Energy storage molecule of carbohydrates for plants






43. Rule for all amino acids that are nonbasic and nonacidic pertaining to pI value?






44. Hydrophilic amino acids






45. Enzyme that hydrolyzes maltose into 2 glucose molecules?






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






47. Characteristics of hydrophobic amino acids






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






49. Name for 5 membered ring






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