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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 polar amino acids






2. 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)






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






4. 4 causes of denaturation of proteins






5. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






6. Acidic amino acids






7. Acetic acid formula?






8. Characteristic of basic amino acids






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






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






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






12. Hydrolysis






13. Energy storage molecule of carbohydrates for plants






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






15. Histidine






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






17. Enzyme that hydrolyzes lactose into galactose and glucose into






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






19. Molecules with the same atoms - but different bonds






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






21. Unique feature of proline






22. Glyceraldehyde






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






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






25. Interconversion btw two anomers






26. 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






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






28. Fxn of cholesterol in the membrane?






29. Glycosidic linkage of sucrose






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






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






32. D and L describe what?






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






34. Basic amino acids






35. Fatty acid structure






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






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






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






39. Polar amino acids






40. Sulfur containing amino acids






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






42. 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






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






44. Glycosidic linkage of maltose






45. Unique feature of cysteine






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






47. Physiological pH






48. Unique feature of glycine






49. (+) and (-) describe what?






50. Sugar with an aldehyde at the first carbon position