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Chapter 10 Cell Growth and Division

Reading Guide and Division

Section 10–1 Cell Growth, Division and Reproduction (pages 274-278)

Limits to Cell Size

1.      What are two reasons why cells divide rather than continue to grow indefinitely?

a. T

.

b. T

 

2.      In the visual analogy of the growing town, what does the library represent? Identify a characteristic that make it a good choice for this analogy.

 

 

 

 

 

 

 

 

3.      Is the following sentence true or false? As a cell’s size increases, its amount of DNA also increases._______________

 

4.      Is the following sentence true or false? As a cell grows in size, its volume increases

much more rapidly than its surface area. ________________

 

Cell Division and Reproduction

5.      ญญญญญญญญญญญญญญญญญญญญญญ_________________________________________is the formation of new individuals.

 

6.      For single-celled organisms, cell division is a form of ______________        reproduction.

 

 

7.       Most multicellular organisms reproduce by ______________________       reproduction.

 

 

 

 

 

 

 

 

 

8.      What are the advantages and disadvantages of both asexual and sexual reproduction.

 

Asexual and Sexual Reproduction

 

Advantages

Disadvantages

Sexual Reproduction

 

 

Asexual Reproduction

 

 

Cell division

Section 10–2 The Process of Cell Division (pages 279-285)

 

Chromosomes

9.      Cells carry genetic information in packages of DNA called __________________ .

 

10.   In eukaryotic cells, the genetic structure consists of DNA and a tightly wound protein, which together form a substance called ________________      .

 

 

11.                    _________ make possible the precise separation of DNA during cell division.

 

12.  What happens during interphase?

 

13.   Complete the cell cycle diagram by writing the correct name of each of the four phases: G1 phase, G2 phase, S phase and M phase

  

 

 

 

 

 

 

 

 


 

14.  Interphase is divided into what three phases?

 

a. ______________________b.________________________c.________________________

 

15.  In eukaryotic cells, what happens in the G1 phase that differs from the G2 phase?

 

16.  What happens during the S phase?

 

17.   In eukaryotic cells, what are the two main stages of cell division?

A, key proteins associated with the chromosomes

Mitosis

 

18.  What are the four phases of mitosis in order?

a. ______________________________c. ________________________________

 

b. ______________________________d.________________________________

 

19.  During prophase, when cell chromosomes become visible, what are the duplicated strands of DNA called?

 

20.  Circle the letter of the name for the two tiny structures located in the cytoplasm near

the nuclear envelope at the beginning of prophase.

a. centrioles                                   c. centromeres

b. spindles                                     d. chromatids

 

21.  What is the spindle? T

 

 

Match the description of the event with the phase of mitosis it is in. Each

phase may be used more than once.

Event                                                                                                              Phase

___________21. The chromosomes move until they form two groups          a. Prophase

near the poles of the spindle.

 

___________22. The chromosomes become visible.                                      b. Metaphase

 

___________23. A nuclear envelope re-forms around each cluster of          c. Anaphase

chromosomes.

 

___________24. The centrioles take up positions on opposite sides of         d. Telophase

the nucleus.

 

___________25. The chromosomes line up across the center of the cell.

 

___________26. The nucleolus becomes visible in each daughter

nucleus.of the text. Students should write the Glossary definition of each term.

 

 

27.  Identify each of the four phases of mitosis pictured below.

 

Cytokinesis

28.  What is cytokinesis?

 

 

29.   How does cytokinesis occur in most animal cells?

 

 

30.  Circle the letter of what forms midway between the divided nuclei during

cytokinesis in plant cells.

a. cell nucleus                                c. cell plate

b. cytoplasm                                  d. cytoplasmic organelles / 1 or

 

Section 10–3 Regulating the Cell Cycle (pages 286-290)

 

Controls on Cell Division

31.  What do cyclins regulate?

 

 

32.  What is apoptosis? T

 

 

Cancer: Uncontrolled Cell Growth

33.  What is cancer?

 

 

34.  What are the two basic types of tumors? Explain how they are different.

 

 

 

35.  What is the cause of cancer?

 

Section 10–4 Cell Differentiation (pages 292-297)

 

From One Cell to Many

36.  Humans, pets, and petunias all pass through an early stage of development called a(n)             ________________________________________.

 

37.  Cells become   ___________________ through the process of differentiation.

 

38.   Scientists have mapped the outcome of every _________________            that leads to differentiation in the development of the microscopic worm C. elegans.

 

39.   Most cells in the adult body are no longer capable of           _______________________.

Stem Cells and Development

               40. Which is an example of a totipotent cell?

                     A. blastocyst                                           C. fertilized egg

                     B. bone cell                                             D. lymphocyte

                    

               41.  Cells that are pluripotent are unable to develop into the tissue that

                     A. forms the skin.                                               C. produces blood cells.

                     B. lines the digestive tract.                       D. surrounds an embryo.

                    

                    

               42.  Adult stem cells are best described as

                     A. multipotent.                                        C. totipotent.

                    B. pluripotent.                                          D. unable to differentiate.

                    

                    

43.  Complete the concept map by identifying some of the types of cells that embryonic stem cells give rise to.

Text Box: can become

  

 

 

 

 


 

 

 

 

Frontiers in Stem Cell Research

                 44.  Which is not a new, potential benefit of stem cell research?

A. growing new skin cells to repair a cut

B. replacing heart cells damaged by heart attacks

C. repairing breaks between nerve cells in spinal injuries

D. preventing suffering and death caused by cellular damage

                45. What is the main reason that embryonic stem cell research is considered ethically controversial?

A. harvesting embryonic stems cells can only help a few people

B. harvesting embryonic stem cells is an important political issue

C. harvesting embryonic stem cells causes the destruction of the embryo

D. harvesting embryonic stem cells can cause cellular damage

                46. What is one new technology that could make stem cell research less controversial?

A. implanting skin cells instead of stem cells in damaged tissue

B. developing the ability to switch on the genes that make an adult cell pluripotent

C. replacing stem cells with cancer cells

D. using the Internet to get more people to accept stem cell research