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MCAT Organic Chemistry 2

Subjects : mcat, science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. Glyceraldehyde






2. Characteristic of basic amino acids






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






4. Polar amino acids






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






6. Fxn of cholesterol in the membrane?






7. Characteristics of acidic amino acids






8. What kind of lipids compromise the lipid bilayer?






9. Interconversion btw two anomers






10. Name for 6 membered ring






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






12. 3 carbon triol that forms backbone of triacylglycerol






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






14. D and L describe what?






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






16. Fatty acid structure






17. 3 physiological roles of lipids






18. Enzymes that hydrolyze fats






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






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






21. 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






22. Nonpolar - hydrophobic amino acids






23. Glycosidic linkage of sucrose






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






25. 4 causes of denaturation of proteins






26. Acetic acid formula?






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






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






29. Unique feature of cysteine






30. 2 reasons why fats have more efficient energy stores than carbs






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






32. Sulfur containing amino acids






33. Energy storage molecule of carbohydrates for plants






34. Sugar with an aldehyde at the first carbon position






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. Hydrophilic amino acids






37. Basic amino acids






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






39. Formula for urea






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






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






42. Characteristics of polar amino acids






43. 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






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






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






46. 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)






47. Unique feature of proline






48. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






49. Histidine






50. Name for 5 membered ring






Can you answer 50 questions in 15 minutes?



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