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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. Diastereomers that vary in the configuration of 1 chiral center






2. 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






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






4. Polar amino acids






5. Physiological pH






6. 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






7. Acetic acid formula?






8. What kind of lipids compromise the lipid bilayer?






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






10. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






11. Fatty acid structure






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






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






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






15. Name for 5 membered ring






16. Sulfur containing amino acids






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






18. 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)






19. 3 carbon triol that forms backbone of triacylglycerol






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






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






22. Enzymes that hydrolyze fats






23. Histidine






24. Hydrophilic amino acids






25. Hydrolysis






26. Energy storage molecule of carbohydrates for animals






27. Unique feature of proline






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






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






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






31. 2 reasons why fats have more efficient energy stores than carbs






32. Enzyme that hydrolyzes maltose into 2 glucose molecules?






33. 2 covalent bonds formed in proteins






34. Molecules with the same atoms - but different bonds






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






36. Characteristics of acidic amino acids






37. Acidic amino acids






38. Glycosidic linkage of lactose






39. Glycosidic linkage of maltose






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






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






42. Characteristics of polar amino acids






43. Name for 6 membered ring






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






45. What stabilizes lipid bilayer?






46. Unique feature of cysteine






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






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






49. Characteristics of hydrophobic amino acids






50. D and L describe what?