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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. Characteristics of acidic amino acids






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






4. 2 reasons why fats have more efficient energy stores than carbs






5. Characteristics of hydrophobic amino acids






6. Enzyme that hydrolyzes lactose into galactose and glucose into






7. 2 covalent bonds formed in proteins






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






9. Characteristic of basic amino acids






10. Energy storage molecule of carbohydrates for plants






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






12. Nonpolar - hydrophobic amino acids






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






14. Histidine






15. Fxn of cholesterol in the membrane?






16. Glycosidic linkage of cellulose






17. 3 physiological roles of lipids






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






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






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






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






22. Name for 6 membered ring






23. Physiological pH






24. What kind of lipids compromise the lipid bilayer?






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






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






27. Sulfur containing amino acids






28. Energy storage molecule of carbohydrates for animals






29. Unique feature of cysteine






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






31. 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)






32. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






33. Polar amino acids






34. Basic amino acids






35. 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






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






37. D and L describe what?






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






39. Enzymes that hydrolyze fats






40. Molecules with the same atoms - but different bonds






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






42. Acetic acid formula?






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






44. Glyceraldehyde






45. Name for 5 membered ring






46. Naturally occurring carbohydrates are formed from what?






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






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






49. Unique feature of glycine






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