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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. 2 covalent bonds formed in proteins






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






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






4. Glycosidic linkage of lactose






5. Fxn of cholesterol in the membrane?






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






7. 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






8. Sulfur containing amino acids






9. Unique feature of proline






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






11. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






12. Polar amino acids






13. Glycosidic linkage of sucrose






14. What kind of lipids compromise the lipid bilayer?






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






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






17. 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)






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






19. Hydrophilic amino acids






20. D and L describe what?






21. Characteristics of polar amino acids






22. What stabilizes lipid bilayer?






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






24. 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






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






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






27. Formula for urea






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






29. Basic amino acids






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. Enzyme that hydrolyzes maltose into 2 glucose molecules?






32. 2 reasons why fats have more efficient energy stores than carbs






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






34. Energy storage molecule of carbohydrates for plants






35. Interconversion btw two anomers






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






37. Enzymes that hydrolyze fats






38. 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






39. Nonpolar - hydrophobic amino acids






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






41. Physiological pH






42. Naturally occurring carbohydrates are formed from what?






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






44. Unique feature of glycine






45. Glycosidic linkage of cellulose






46. 3 carbon triol that forms backbone of triacylglycerol






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






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






49. Name for 6 membered ring






50. Characteristic of basic amino acids