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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. Enzyme that hydrolyzes lactose into galactose and glucose into






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






3. Histidine






4. Glyceraldehyde






5. Glycosidic linkage of cellulose






6. Nonpolar - hydrophobic amino acids






7. Basic amino acids






8. Unique feature of cysteine






9. 4 causes of denaturation of proteins






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






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






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






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






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






15. 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






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






17. D and L describe what?






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






19. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






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






21. Glycosidic linkage of lactose






22. Unique feature of glycine






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






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






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






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






27. Physiological pH






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






29. Enzyme that hydrolyzes maltose into 2 glucose molecules?






30. 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






31. Name for 5 membered ring






32. Naturally occurring carbohydrates are formed from what?






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






34. 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)






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






37. What kind of lipids compromise the lipid bilayer?






38. What stabilizes lipid bilayer?






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






40. Sugar with an aldehyde at the first carbon position






41. Characteristics of acidic amino acids






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






43. Sulfur containing amino acids






44. Energy storage molecule of carbohydrates for animals






45. Glycosidic linkage of maltose






46. Polar amino acids






47. Energy storage molecule of carbohydrates for plants






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






49. Formula for urea






50. Molecules with the same atoms - but different bonds







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