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






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






3. Histidine






4. Hydrophilic amino acids






5. Interconversion btw two anomers






6. What stabilizes lipid bilayer?






7. 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






8. Characteristics of hydrophobic amino acids






9. 3 physiological roles of lipids






10. Naturally occurring carbohydrates are formed from what?






11. Enzyme that hydrolyzes maltose into 2 glucose molecules?






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






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






14. 4 causes of denaturation of proteins






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






16. Acetic acid formula?






17. Unique feature of proline






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






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






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






21. 3 carbon triol that forms backbone of triacylglycerol






22. What describes the affinity of functional groups for a proton?






23. Molecules with the same atoms - but different bonds






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






25. Name for 5 membered ring






26. Sulfur containing amino acids






27. Formula for urea






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






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






30. 2 covalent bonds formed in proteins






31. Glycosidic linkage of lactose






32. 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)






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






34. Unique feature of cysteine






35. Characteristic of basic amino acids






36. 2 reasons why fats have more efficient energy stores than carbs






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






38. Physiological pH






39. Nonpolar - hydrophobic amino acids






40. Sugar with an aldehyde at the first carbon position






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






42. Characteristics of polar amino acids






43. Characteristics of acidic amino acids






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






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






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






47. 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






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






49. What kind of lipids compromise the lipid bilayer?






50. Energy storage molecule of carbohydrates for plants