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






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






3. Characteristic of basic amino acids






4. Unique feature of proline






5. Glyceraldehyde






6. Glycosidic linkage of lactose






7. Fatty acid structure






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






9. 4 causes of denaturation of proteins






10. Nonpolar - hydrophobic amino acids






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






12. 3 physiological roles of lipids






13. Polar amino acids






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






15. Enzyme that hydrolyzes maltose into 2 glucose molecules?






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






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






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






19. 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






20. 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)






21. Energy storage molecule of carbohydrates for animals






22. Histidine






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






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






25. Enzymes that hydrolyze fats






26. D and L describe what?






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






28. Acidic amino acids






29. Sulfur containing amino acids






30. Hydrolysis






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






32. Name for 6 membered ring






33. Fxn of cholesterol in the membrane?






34. 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






35. Amino group placed on the right of a fischer projection is a?






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






37. Formula for urea






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






39. Molecules with the same atoms - but different bonds






40. Physiological pH






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






42. 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






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






44. Enzyme that hydrolyzes lactose into galactose and glucose into






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






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






47. Name for 5 membered ring






48. Glycosidic linkage of maltose






49. Characteristics of hydrophobic amino acids






50. What stabilizes lipid bilayer?