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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. What stabilizes lipid bilayer?






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






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






4. Naturally occurring carbohydrates are formed from what?






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






6. Glycosidic linkage of cellulose






7. Unique feature of proline






8. Enzyme that hydrolyzes maltose into 2 glucose molecules?






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






10. Glycosidic linkage of lactose






11. Name for 5 membered ring






12. Acidic amino acids






13. Fxn of cholesterol in the membrane?






14. Unique feature of glycine






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






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






17. 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






18. 2 covalent bonds formed in proteins






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






20. Energy storage molecule of carbohydrates for plants






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






22. Glycosidic linkage of sucrose






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






24. D and L describe what?






25. Enzymes that hydrolyze fats






26. Characteristics of acidic amino acids






27. Polar amino acids






28. 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






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






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






31. Sulfur containing amino acids






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






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






34. Unique feature of cysteine






35. 2 things that accelerate the rate of hydrolysis for peptide cleavage?






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






37. Characteristics of polar amino acids






38. Nonpolar - hydrophobic amino acids






39. 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






40. Fatty acid structure






41. Sugar with an aldehyde at the first carbon position






42. Interconversion btw two anomers






43. Hydrophilic amino acids






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






45. 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)






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






47. 3 physiological roles of lipids






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






49. Name for 6 membered ring






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