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






3. Naturally occurring carbohydrates are formed from what?






4. Physiological pH






5. 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






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






7. Fatty acid structure






8. 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)






9. Characteristics of acidic amino acids






10. Glycosidic linkage of sucrose






11. Hydrophilic amino acids






12. Enzymes that hydrolyze fats






13. 2 covalent bonds formed in proteins






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






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






16. Glycosidic linkage of maltose






17. Fxn of cholesterol in the membrane?






18. Characteristics of polar amino acids






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






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






21. 2 reasons why fats have more efficient energy stores than carbs






22. Energy storage molecule of carbohydrates for animals






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






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






25. Energy storage molecule of carbohydrates for plants






26. D and L describe what?






27. Sugar with an aldehyde at the first carbon position






28. Glycosidic linkage of cellulose






29. Polar amino acids






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






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






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






33. What stabilizes lipid bilayer?






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






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






36. Unique feature of glycine






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






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






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. Glycosidic linkage of lactose






41. Nonpolar - hydrophobic amino acids






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






43. Name for 6 membered ring






44. Histidine






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






46. Enzyme that hydrolyzes lactose into galactose and glucose into






47. Hydrolysis






48. Glyceraldehyde






49. 4 causes of denaturation of proteins






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