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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. Name for 6 membered ring






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






3. 2 covalent bonds formed in proteins






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






5. 3 carbon triol that forms backbone of triacylglycerol






6. Sulfur containing amino acids






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






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






9. 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






10. 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






11. Unique feature of proline






12. Acetic acid formula?






13. Fatty acid structure






14. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






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






16. 4 causes of denaturation of proteins






17. Characteristics of hydrophobic amino acids






18. Naturally occurring carbohydrates are formed from what?






19. Molecules with the same atoms - but different bonds






20. What stabilizes lipid bilayer?






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






22. 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)






23. What kind of lipids compromise the lipid bilayer?






24. 2 reasons why fats have more efficient energy stores than carbs






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






26. Unique feature of cysteine






27. Glycosidic linkage of lactose






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






29. Name for 5 membered ring






30. 3 physiological roles of lipids






31. Glycosidic linkage of maltose






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






33. Physiological pH






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






35. Interconversion btw two anomers






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






37. Nonpolar - hydrophobic amino acids






38. Fxn of cholesterol in the membrane?






39. Enzyme that hydrolyzes lactose into galactose and glucose into






40. Characteristic of basic amino acids






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






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






43. Sugar with an aldehyde at the first carbon position






44. Polar amino acids






45. Hydrolysis






46. Acidic amino acids






47. D and L describe what?






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






49. Histidine






50. Energy storage molecule of carbohydrates for plants