Biology Junction Team - BIOLOGY JUNCTION

Summer Assignment

Summer Assignments
#1Choose a book or a movie by Robin Cook to read or view. Dr Robin Cook is considered to be the master of the medical thriller! Sometimes his books are classified as science fiction and sometimes as horror. He does an enormous amount of research so all of his books contain good, exciting biology. After reading the book (preferably) or viewing the video, write a 3-4 page paper giving a summary and a critique of the book or video . Be sure to emphasis the biological aspect and write in third person.

Contact a research scientist or field biologist in our area and conduct an interview about their current research. Using your interview notes, write a newspaper article about this scientist. Include a picture of the scientist with your article for bonus points!

The two assignments will each count as a test grade and are due the first week of school.

	Back
Summer e-mail	cmassengale8@classicnet.net

Sugar Template

Sucrose Hydolysis by Sucrase

Sucrose Hydrolysis Using Sucrase

INTRODUCTION:

In this lab, you will demonstrate the production of the enzyme sucrase (invertase) by yeast. The enzyme sucrase catalyzes the hydrolysis of the disaccharide sucrose to invert sugar. Invert sugar is a mixture of glucose and fructose, which are both monosaccharides. Yeast cannot directly metabolize (ferment) sucrose. For the yeast to utilize sucrose as an energy source, it must first convert it to the fermentable monosaccharides glucose and fructose.
Benedict’s solution is a test reagent that reacts positively with simple reducing sugars. All monosaccharides and most disaccharides are reducing sugars, possessing a free carbonyl group (=C=O). Sucrose is an exception in that it is not a reducing sugar. A positive Benedict’s test is observed as the formation of a brownish-red cuprous oxide precipitate. A weaker positive test will be yellow to orange. Both glucose and fructose test positive with benedict’s solution, sucrose does not.

MATERIALS NEEDED:

*Yeast filtrate solution
one 7 gram package active dry yeast per 80 mL distilled water
Ring stand and ring to hold funnel
Filtering funnel
Filter paper (fast speed)
**5% sucrose solution
5 grams sucrose per 95 mL distilled water
***5% glucose (dextrose) solution
5 grams dextrose per 95 mL distilled water
Benedict’s qualitative solution
Distilled water
Five 10-mL graduated cylinders (one for each solution)
7 test tubes 18 x 150 mm
Test tube holder
Test tube rack
2 400-mL beakers
Hot plate

PRE-LAB:

* To prepare a yeast filtrate solution, mix one package of active dry yeast with 80 mL of distilled water. Let stand for 20 minutes, stirring occasionally. Filter the resulting suspension and save the filtrate solution. This is your invertase extract. Refrigerate the extract if held overnight. Approximately enough for 8 labs.

**To prepare a 5% sucrose solution, dissolve 5 grams of sucrose in 95 mL of distilled water. This should be prepared shortly before use. Approximately enough for 4 labs.

***To prepare a 5% glucose solution, dissolve 5 grams of dextrose (this is the name used when dry) in 95 mL of distilled water. This should be prepared shortly before use. Approximately enough for 9 labs.

PROCEDURE:

1. Label 3 test tubes A1, A2, and A3, and place in the test tube rack. Place into the test tubes as follows:

10 mL

Into tube A2, place 10 mL of 5% sucrose solution and 4 mL of invertase extract.

Into tube A3, place 10 mL distilled water and 4 mL of invertase extract.

Thump the tubes to mix.

2. Put approximately 250 mL of 30 to 35 oC water into a 400-mL beaker. Incubate the three tubes in this warm water bath for 35 minutes.

3. Label 4 test tubes B1, B2, B3 and B4, and place in the test tube rack. Place 5 mL of Benedict’s qualitative solution into each tube. Now transfer to the B tubes as follows:

Into tube B2, transfer the contents of tube A2.

Into tube B3, transfer the contents of tube A3.

Into tube B4, place 10 mL of 5% glucose solution.

Thump the tubes to mix.

4. Place tubes B1, B2, B3, and B4 into a boiling water bath. CAUTION: do not let the bath boil hard. Keep it just at the boiling point. After 3 or 4 minutes, remove the tubes and note whither any change is evident.

QUESTIONS AND OBSERVATIONS:

1. Did tube B1 test positive or negative?

2. What does this show?

3. Did tube B2 test positive or negative?

4. What does this show?

5. Did tube B3 test positive or negative?

6. What does this show?

7. Did tube B4 test positive or negative?

8. What does this show?

Successful AP Biology Student

The Successful Biology Student:

Realizes this is a fast-paced course so they have excellent attendance.
Is never late.
Always has their textbook, notebook, lab book, pencil, … when they come to class.
Let’s the teacher know ahead of time when they will miss for a doctor’s appointment or school trip.
Makes certain that all assignments, labs, projects, and reports are completed on time.
Schedules tests & labs to be made up after school when they return from an absence.
Does not miss an excessive number of class periods for school trips.
Keeps track of their grade.
Always reads every lab before that lab day.
Reads and recopies lecture notes and keeps them in an organized notebook.
Reads all chapters before lecture.
Reviews all chapters and notes each day.
Asks questions in class.
Utilizes the computer tutorials that supplement each unit of study.
Pays attention in class.
Keeps neat & accurate lab data to be organized in lab reports.
Follows all instructions for projects & collections.

HOME

BACK

Study of Biology pptQ

Study of Biology
ppt Questions

What is Biology?

1. Define biology.

2. What are organisms?

3. Name 5 groups of organisms.

4. Living things share common _______________.

5. What is the basic unit of life that makes up all organisms?

6. To survive, populations of organisms must be able to _____________ offspring.

7. All organisms have a _________ code carried in a molecule called _______.

8. Organisms require ____________ such as food and need __________ for their activities.

9. Living things _________ to their environment.

10. Organisms must maintain what type of internal environments ?

11. What does evolve mean?

12. Do groups or individuals evolve?

Characteristics

13. All ____________ are made of cells.

14. Most cells are so __________, they can’t be seen without a microscope.

15. What is cytoplasm?

16. What surrounds all cells?

17. What is the function of the cell membrane?

18. Cells are complex and highly ___________.

19. What are organelles and give an example?

20. The simplest type of cells are known as ______________.

21. Describe prokaryotic cells.

22. Name one of the most common prokaryotes.

23. More complex cells are called ______________.

24. Eukaryotes have a true _________ and _________________ organelles.

25. Name 3 types of eukaryotic cells.

26. Organisms can be grouped by their __________ of cells.

27. Define unicellular organisms.

28. What are multicellular organisms?

Reproduction

29. When organisms reproduce they pass what on to their offspring?

30. Name 2 types of reproduction.

31. What type of reproduction involves 2 parents?

32. A fertilized egg is called a ___________.

33. Are sexually reproduce organisms genetically identical to their parents?

34. asexual reproduction involves a _____________ parent or _________.

35. In asexual reproduction, a single cell __________ to form two new cells.

36. How do asexually reproduced organisms genetically compare to their parents?

Genetic Code

37. What carries the genetic code for all organisms?

38.DNA stands for ____________________ ___________.

39. Do all organisms have DNA?

40. What does DNA code for in a cell?

41. Why are proteins so important to cells?

Growth and Development

42. Name the stages of development in the life of a frog.

43. Name two ways that organisms grow.

44. When organisms change into adults they ___________ and may change.

Requiring Food and Energy

45. What organisms can make their own food?

46. What is a photoautotroph and give an example.

47. What food making process is used by photoautotrophs?

48. What do chemoautotrophs use to get energy?

49. ___________ cannot make their own food.

50. How do heterotrophs meet their food requirements?

51. Name 3 groups of heterotrophs.

52. Explain the difference among herbivores, carnivores, and omnivores.

53. Define metabolism.

54. All metabolic processes require ____________.

55. What is the ultimate energy for all life on earth?

56. What metabolic process uses sunlight for energy?

57. Write the balanced overall equation for the photosynthesis process and label the reactants & products.

58. What metabolic process releases the chemical energy stored in food?

59. Write the balanced overall equation for cellular respiration .

60. Name several environmental factors that organisms respond to.

61. Give an example of an organism responding to their environment to promote survival.

62. Define homeostasis.

63. Give 3 examples of internal conditions in which organisms must maintain stability.

64. Why do populations evolve?

65. What record do we have that populations evolve?

Organization Levels

66. Name 3 nonliving levels into which life is organized.

67. At what level of organization does life begin?

68. Cells organize into ____________.

69. What makes up organs?

70. Organs working together become a ____________, and these working together make the entire _____________.

71. From simplest to most complex, list the levels of life above organism.

72. What is the most inclusive level of life?

BACK