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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. 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






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






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






4. Characteristics of acidic amino acids






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






6. Interconversion btw two anomers






7. 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)






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






9. Unique feature of cysteine






10. Name for 6 membered ring






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






12. Energy storage molecule of carbohydrates for plants






13. Unique feature of proline






14. Naturally occurring carbohydrates are formed from what?






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






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






17. Glyceraldehyde






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






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






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






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






22. Enzymes that hydrolyze fats






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






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






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






26. 2 reasons why fats have more efficient energy stores than carbs






27. What kind of lipids compromise the lipid bilayer?






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






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






30. Unique feature of glycine






31. Characteristics of polar amino acids






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






33. D and L describe what?






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






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






36. Formula for urea






37. Basic amino acids






38. Enzyme that hydrolyzes maltose into 2 glucose molecules?






39. 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






40. Sulfur containing amino acids






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






42. Molecules with the same atoms - but different bonds






43. Glycosidic linkage of maltose






44. Polar amino acids






45. Fatty acid structure






46. Name for 5 membered ring






47. Glycosidic linkage of lactose






48. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






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






50. 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