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






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






3. Formula for urea






4. 4 causes of denaturation of proteins






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






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






7. Generated btw either thiols on different proteins or thiols on the same protein






8. 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






9. Physiological pH






10. Unique feature of glycine






11. Histidine






12. Glycosidic linkage of lactose






13. What kind of lipids compromise the lipid bilayer?






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






15. Energy storage molecule of carbohydrates for plants






16. Sugar with an aldehyde at the first carbon position






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






18. Acidic amino acids






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






20. Hydrolysis






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






22. 2 covalent bonds formed in proteins






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






24. Name for 6 membered ring






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






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






27. Enzyme that hydrolyzes lactose into galactose and glucose into






28. Hydrophilic amino acids






29. 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)






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






31. 3 physiological roles of lipids






32. Enzyme that hydrolyzes maltose into 2 glucose molecules?






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






34. 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






35. Enzymes that hydrolyze fats






36. Energy storage molecule of carbohydrates for animals






37. Molecules with the same atoms - but different bonds






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






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






40. Naturally occurring carbohydrates are formed from what?






41. Name for 5 membered ring






42. What stabilizes lipid bilayer?






43. Unique feature of proline






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






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






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






47. 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






48. Characteristic of basic amino acids






49. Glycosidic linkage of maltose






50. Polar amino acids