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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. Molecule can act as a base and as an acid






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






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






4. 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






5. Glycosidic linkage of lactose






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






7. Fatty acid structure






8. 3 carbon triol that forms backbone of triacylglycerol






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






10. 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)






11. Polar amino acids






12. Energy storage molecule of carbohydrates for animals






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






14. 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






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






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






17. Acidic amino acids






18. What stabilizes lipid bilayer?






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






20. Physiological pH






21. Unique feature of cysteine






22. Characteristic of basic amino acids






23. Nonpolar - hydrophobic amino acids






24. Enzymes that hydrolyze fats






25. Characteristics of hydrophobic amino acids






26. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






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






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






29. Basic amino acids






30. D and L describe what?






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






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






33. 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






34. Enzyme that hydrolyzes lactose into galactose and glucose into






35. Enzyme that hydrolyzes maltose into 2 glucose molecules?






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






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






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






39. Unique feature of glycine






40. Sulfur containing amino acids






41. 2 covalent bonds formed in proteins






42. Glycosidic linkage of cellulose






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






44. Name for 6 membered ring






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






46. Characteristics of acidic amino acids






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






48. Naturally occurring carbohydrates are formed from what?






49. Acetic acid formula?






50. Unique feature of proline