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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. Glycosidic linkage of maltose






3. Unique feature of cysteine






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






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






6. Enzymes that hydrolyze fats






7. Polar amino acids






8. Name for 5 membered ring






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






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






11. 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






12. Unique feature of proline






13. Characteristics of hydrophobic amino acids






14. 2 reasons why fats have more efficient energy stores than carbs






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






16. Interconversion btw two anomers






17. Glycosidic linkage of cellulose






18. 3 physiological roles of lipids






19. Basic amino acids






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






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






22. 4 causes of denaturation of proteins






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






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






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






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






27. Acidic amino acids






28. 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






29. Sulfur containing amino acids






30. Hydrolysis






31. Formula for urea






32. Glyceraldehyde






33. 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)






34. Fxn of cholesterol in the membrane?






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






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






37. Enzyme that hydrolyzes lactose into galactose and glucose into






38. Glycosidic linkage of sucrose






39. Characteristics of acidic amino acids






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






41. Energy storage molecule of carbohydrates for plants






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






43. Acetic acid formula?






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






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






46. Unique feature of glycine






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






48. Glycosidic linkage of lactose






49. Nonpolar - hydrophobic amino acids






50. Fatty acid structure