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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. Energy storage molecule of carbohydrates for animals






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






3. Histidine






4. 3 carbon triol that forms backbone of triacylglycerol






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






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






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






8. Hydrolysis






9. Characteristics of hydrophobic amino acids






10. Formula for urea






11. Characteristics of acidic amino acids






12. Sulfur containing amino acids






13. Fatty acid structure






14. 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






15. 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






16. Energy storage molecule of carbohydrates for plants






17. Interconversion btw two anomers






18. Polar amino acids






19. 2 covalent bonds formed in proteins






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






21. Glyceraldehyde






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






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






24. What stabilizes lipid bilayer?






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






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






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






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






29. 4 causes of denaturation of proteins






30. D and L describe what?






31. (+) and (-) describe what?






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






33. Acidic amino acids






34. Unique feature of glycine






35. Physiological pH






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






37. What kind of lipids compromise the lipid bilayer?






38. Glycosidic linkage of cellulose






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






40. Fxn of cholesterol in the membrane?






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






42. Characteristic of basic amino acids






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






44. 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






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






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






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






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






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






50. Basic amino acids