1. Define Solute, Solution, Solvent and Give an Example of Each

Biochemistry Test Corrections

Answer only the questions you missed on your test on a separate sheet of paper. Questions MUST be answered thoroughly to receive credit!

1. Define Solute, Solution, Solvent and give an example of each 2. Describe the structure of a water molecule and why it is considered a polar molecule 3. Define Adhesion and Cohesion 4. Define Capillary Action and give an example of how plants use this process 5. Define surface tension and describe an example of how a water strider uses surface tension 6. What does the pH scale measure and how is an acid different from a base? 7. Give 3 examples of acids with their pHs’ 8. Give 3 example of bases with their pHs’ 9. Draw the pH scale and label the location of strong/weak acids and strong/weak bases, neutral and give examples of both acids and bases. 10. List the different elements found in carbohydrates, lipids, nucleic acids and proteins. Which element(s) do they all have in common? 11. Describe a hydrolysis reaction and give an example of one 12. Define monomer and give examples of monomers for each organic molecule 13. What is a lipid and give some examples 14. Describe a condensation reaction (dehydration synthesis) and give an example of one. 15. What are the common names (examples) for each of the 4 organic molecule groups? 16. Describe the structure and function of an enzyme. What is the monomer that makes up enzymes. 17. What is the monomer for a protein? What makes each protein different? 18. What is the difference between a monosaccharide, disaccharide and polysaccharide and give an example for each one. 19. What are the functions/uses of a lipid? 20. What is the function/use of a nucleic acid? 21. What is an amino acid and what makes each one different? 22. Draw a dipeptide and label the monomers that make up the dipeptide 23. Draw a polysaccharide and give an example of one 24. Define substrate, enzyme, product and active site 25. Explain the action of pepsin in the following diagram: If pepsin works best at a pH of 2, which graph shows these results? What happens beyond a pH of 2? A 26. Label each part of the diagram and explain what is happening (label: enzyme, action site, substrate, products) 27. Explain the following diagram with respect to temperature and enzyme function. How does temperature effect enzyme function?

28. What effect does pH have on an enzymes’ function? Give an example using pepsin what works in the stomach at a pH of 2 and the small intestine that has a pH of 8. 29. At which pH does the following enzyme work best (optimum pH). And where in the body might we find this enzyme?

30. Identify the macromolecules tested for with Benedict’s Solution, Biuret and Iodine.