WUHSD Final Exam Review 2010-11 Semester 1

1. WUHSDFinal Exam Review2010-11Semester 1 LSHS rev. YM 2011

2. Investigation & Experimentation (I&E 1c,e,f) 1. Define Hypothesis:

3. 1. Define Hypothesis: a testable possible explanation of an observation.

4. 2. Define Theory:

5. 2. Define Theory: an explanation that has been tested and confirmed many times

6. 3.What is a controlled experiment?

7. 3.What is a controlled experiment? An experiment where all variables are kept the same except one.

8. 4. Why is a control group important to have in an experiment?

9. 4. Why is a control group important to have in an experiment? It is a part of the experiment that is not tested and is used to compare results.

10. 5. Define Independent Variable

11. 5. Define Independent Variable The variable, on the x axis, that the scientist is in control of. Ex. time, temperature

12. 6. Define Dependent Variable

13. 6. Define Dependent Variable The variable, on the Y axis, that is the RESULT. Ex. # bubbles produced

14. 7. Explain possible sources of errors in an experiment.

15. 7. Explain possible sources of errors in an experiment. -human error -equipment doesn’t work correctly

16. 8. Define monomer:

17. 8. Define monomer: Small, simple molecules

18. 9. Define polymer:

19. 9. Define polymer: Large, complex molecules made from simple monomers

20. Polymer Monomer Common Example Carbohydrates (Polysaccharides) Amino Acids Lipids Nucleotides 10. Fill in the chart below.

21. Polymer Monomer Common Example Monosaccharide Protein Amino Acids Glycerol and Fatty acids Nucleic Acids Nucleotides 10. Fill in the chart below. Carbohydrates (Polysaccharides) Glucose, C6H12O6 Muscle, Enzymes Lipids Oils, waxes DNA and RNA

22. 11. What does Benedict’s solution test for? Explain a positive test.

23. 11. What does Benedict’s solution test for? Explain a positive test. 1. Monosaccharides. 2. In the presence of a MONOSACCHARIDE and HEAT, it changes from BLUE to RED/ORANGE.

24. 12. Define Denature.

25. 12. Define Denature. The proteins’ natural structure is permanently changed.

26. 13. What is a catalyst?

27. 13. What is a catalyst? Chemicals that can speed up a chemical reaction.

28. 14. What is an enzyme?

29. 14. What is an enzyme? A Biological catalyst that speeds up reactions by decreasing activation energy.

30. 15. What factors can reduce the activity of an enzyme?

31. 15. What factors can reduce the activity of an enzyme? Change in pH and Temperature.

32. 16. Describe the process in the figure below.

33. 16. Describe the process in the figure below. substrate binds to the active site the reaction occurs the products are released

34. 17. Does the enzyme change during this process?

35. 17. Does the enzyme change during this process? No

36. 18. What happens to the enzyme following this process?

37. 18. What happens to the enzyme following this process? It gets recycled

38. Cell Structure & Function(Cell Biology 1a-e) 13. What is the difference between prokaryotic and eukaryotic cells?

39. 19. List the three parts of the Cell Theory.

40. 19. List the three parts of the Cell Theory. All living things are composed of cells. Cells are the basic unit of life. New cells are produced from other cells

41. 20. What is the difference between a prokaryotic cell and eukaryotic cell?

42. 20. What is the difference between prokaryotic and eukaryotic cells?

43. 21. Give an example of a prokaryotic cell:

44. 21. Give an example of a prokaryotic cell: Bacterium

45. 22. Give at least two examples of eukaryotic cells:

46. 22. Give at least two examples of eukaryotic cells: Plant Cell Animal Cell

47. 23. What is a virus?

48. 23. What is a virus? 1. It is NOT a cell. 2. It has a Protein coat and nucleic acid (DNA or RNA)

49. 24. Why are viruses not considered living cells?

50. 24. Why are viruses not considered living cells? They can’t make proteins or reproduce on their own.