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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. 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)






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






3. Hydrophilic amino acids






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






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






6. Characteristics of polar amino acids






7. Formula for urea






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






9. 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






10. 4 causes of denaturation of proteins






11. Sulfur containing amino acids






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






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






14. Fxn of cholesterol in the membrane?






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






16. Name for 6 membered ring






17. Glyceraldehyde






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






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






20. Characteristics of hydrophobic amino acids






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






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






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






24. Interconversion btw two anomers






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






26. Acidic amino acids






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






28. Enzyme that hydrolyzes lactose into galactose and glucose into






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






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






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






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






33. Fatty acid structure






34. Polar amino acids






35. D and L describe what?






36. 2 covalent bonds formed in proteins






37. Characteristics of acidic amino acids






38. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






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






40. Glycosidic linkage of maltose






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






42. Sugar with an aldehyde at the first carbon position






43. 2 reasons why fats have more efficient energy stores than carbs






44. Glycosidic linkage of lactose






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






46. Energy storage molecule of carbohydrates for plants






47. Basic amino acids






48. Enzyme that hydrolyzes maltose into 2 glucose molecules?






49. Unique feature of cysteine






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