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






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






3. D and L describe what?






4. Interconversion btw two anomers






5. Characteristics of acidic amino acids






6. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






7. Nonpolar - hydrophobic amino acids






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






9. Fxn of cholesterol in the membrane?






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






11. Polar amino acids






12. 3 physiological roles of lipids






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






14. Unique feature of proline






15. 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






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






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






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






19. Unique feature of cysteine






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






21. Enzyme that hydrolyzes lactose into galactose and glucose into






22. What kind of lipids compromise the lipid bilayer?






23. 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






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






25. Enzymes that hydrolyze fats






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






27. Acetic acid formula?






28. Name for 5 membered ring






29. Histidine






30. What stabilizes lipid bilayer?






31. Characteristics of polar amino acids






32. Name for 6 membered ring






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






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






35. Glycosidic linkage of lactose






36. Energy storage molecule of carbohydrates for plants






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






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






39. Acidic amino acids






40. Basic amino acids






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






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






43. Characteristic of basic amino acids






44. Characteristics of hydrophobic amino acids






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






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






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






48. 2 covalent bonds formed in proteins






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






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