Docstoc

Cell Growth and Division. - Wikispaces

Document Sample
Cell Growth and Division. - Wikispaces Powered By Docstoc
					Name:

Period:


                         Biology Exam: Cell Growth and Division
                                  Teacher Answer Key
                                       80 Points
(I’m giving the student’s one point for putting their names and period on the tests so I can keep
                                the exams organized per section)
                               Level of Blooms Taxonomy
                        Objective the question corresponds with

Multiple Choice (2 points each): From the list of possible answers provided, select the best
answer or complete the sentence using the best phrase from the list of possibilities. Each
question only has once correct answer. Circle your answer on this test and record it on the
scantron form.

   1. When during the cell cycle is the cell’s DNA replicated?
        a. M Phase
        b. G1 Phase
        c. G2 Phase
        d. S Phase

Objective: 8

Blooms: Knowledge


   2. Which of the following is a factor that can stop normal cells from growing?
           a. A cut in the skin
           b. Growth factors
           c. Contact with other cells
           d. Cyclin that has been taken from a cell in mitosis
Objective: 2
Blooms: Comprehend

   3. Cyclins are a family of closely related proteins that:
         a. Produce p53
         b. Cause cancer
         c. Regulate the cell cycle
          d. Work to heal wounds

Objective: 14

Blooms: Knowledge


   4. The correct order of phases in mitosis is:
         a. Prophase, Metaphase, Telophase, Anaphase
         b. Telophase, Metaphase, Anaphase, Prophase
         c. Prophase, Metaphase, Anaphase, Telophase
         d. Anaphase, Prophase, Telophase, Metaphase

Objective: 8

Blooms: Knowledge



   5. A human body cell entering cell division contains   chromosomes, each of which
      consists of       chromatids.
         a. 46, 2
         b. 23, 2
         c. 86, 4
         d. 46, 4

Objective: 4 & 5

Blooms: Knowledge and Comprehend
   6. The following image illustrates a cell going through cytokinesis. What is the name of the
      structure that forms between the dividing nuclei?
          a. Cell plate
          b. Cell wall
          c. Spindle
          d. Centriole

Objective: 12

Blooms: Comprehend


   7. Most of the life of any cell is spent in a period of cell growth and development called
        a. Telophase
        b. Prophase
        c. Interphase
        d. Metaphase

Objective: 9

Blooms: Comprehend
   8. Which of the following explains why normal cells grown in a petri dish tend to stop
      growing once they have covered the bottom of the dish?
         a. Contact with other cells stops cell growth
         b. The cells lack cyclin
         c. The petri dish inhibits cell growth
         d. Most cells grow in petri dishes have a defective p53

Objective: 1 and 2

Blooms: Knowledge and Comprehend



   9. As a cell becomes larger, its
          a. Volume increases faster than its surface area
          b. Surface area increases faster than its volume
          c. Volume increases, but surface area stays the same
          d. Surface area stays the same, but its volume increases

Objective: 1

Blooms: Knowledge


   10. What is the role of the spindle within mitosis?
         a. It divides the cell in half
         b. It duplicates the DNA
         c. It helps separate the chromosomes
         d. It breaks down the nuclear membrane

Objective: 11

Blooms: Analyze



True/False (2 points each): Identify whether the following statement are either true or false.
Circle your on this test and mark A= True or B= False on the scantron form.

   11. True/False: A chromatid is one of two identical copies of DNA making up a
       chromosome.
Objective: 5
Blooms: Comprehend
12. True/False: Cancer can be defined as a disorder in which some of the body’s own cells
   lose the ability to control growth.
   Objective: 16
   Blooms: Knowledge


13. True/False: Stem cells are specialized cells that have to potential to differentiate into
    some types of cells.
    Objective: 18 and 20
    Blooms: Knowledge and Comprehend


14. True/False: Human embryonic stem cells were first isolated in 1998 by a scientist in
    Wisconsin.
    Objective: 20
    Blooms: Comprehend


15. True/False: There is hope that within the future stems cells can be used to help reverse
    such medical conditions such as brain or spinal cord injuries.
    Objective: 19
    Blooms: Comprehend


16. True/False: Cell division is the process by which chromosomes begin to condense and
    become visible within the cell.
    Objective: 10
    Blooms: Comprehend


17. True/False: Proteins that respond to events outside the cell are called internal
    regulators.
    Objective: 15
    Blooms: Knowledge

18. True/False: An example of an internal regulatory protein makes sure that a cell doesn’t
    enter mitosis until all of its chromosomes have been replicated.
    Objective: 15
    Blooms: Knowledge
   19. True/False: Growth factors are among the most important external regulators and they
       are important during embryonic development and wound healing.
       Objective: 15
       Blooms: Knowledge


   20. True/False: Metaphase is when sister chromatids separate into individual chromosomes
       and are moved apart.
       Objective: 10
       Blooms: Comprehend

Matching (2 points each): Match each description on the left with the correct term on the right.
Each question only has one correct answer. Mark your answers on your scantron sheet.

Questions 21-27
Objectives: 9 and 10
Blooms: Comprehend

Question 28
Objective: 13
Blooms: Analyze

   21. A     Centromere
   22. F    M-Phase
   23. C     Interphase
   24. D     S-Phase
   25. H    G2- Phase
   26. G    G1- Phase
   27. B    G0- Phase
   28. E     Protein Kinases

           a. Region where two                                e. Give the go ahead signals at
              chromatids are attached                            the G1 and G2 checkpoints
           b. Non-dividing state                              f. Shortest part of the cell cycle
           c. Accounts for 90% of the cell                    g. The first part of interphase
              cycle                                              and is then followed by S-
           d. Time when chromosomes                              phase
              are duplicated                                  h. Last part of interphase
    Fill in the blank (2 points each): Use the picture to identify the different stages within mitosis.
    Objective: 11
    Blooms: Analyze




    B




A



                                                                                                          D
                                                                          C
        29. Name the phase of mitosis A is pointing to
            Anaphase


        30. Name the phase of mitosis B is pointing to
            Prophase


        31. Name the phase of mitosis C is pointing to
            Metaphase


        32. Name the phase of mitosis D is pointing to
            Telophase
Short Answer (5 points each): Read each question carefully and provide a concise answer for
the following questions in the space provided.




   33. Why is the timing between what happens to the nuclear envelope and the activity of
      the mitotic spindle so critical?

       During interphase, the nuclear envelope contains a genetic material. During mitosis, the
       spindle fibers pull the chromosomes to specific locations in the cell. Nuclear envelope
       degradation and spindle formation need to be synched.

       Objective: 10 and 11
       Blooms: Comprehend and Analyze
34. Why do you think it is important that cells have a “control system” to regulate the
   timing of cell division?

   There are so many steps involved with cell division that a system must be in place to
   make sure the proper steps have been completed before a cell moves into the next
   phase of cell division. Without this order, cells would not be able to divide successfully.

   Objective: 13
   Blooms: Analyze

35. Summarize the potential benefits and issues of stem cell research. How might
    technological advances help address the ethical concerns surrounding stem cell
    research?

   Benefits: repair or regeneration of cells damaged by certain kinds of disease
   Issues: embryonic stem cells cannot be harvested without destroying the embryo.

   If an adult stem cell could be coaxed into behaving like embryonic stem cells, then
   perhaps there would no longer be a desire by scientists to harvest and use embryonic
   stem cells.

   Objective: 18-20
   Blooms: Knowledge and Comprehend

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:64
posted:11/11/2011
language:English
pages:9