Chapter 10 Focus Questions: BE SURE TO SCROLL DOWN FOR ALL CHAPTER 1O SECTIONS

Chapter 10.1

  1. How does the number/size of cells in an adult compare to those in a child?
  2. What are the two main reasons why cells divide?
  3. Where is the info that controls a cell located in the cell?
  4. What would ultimately happen to the DNAís ability to serve the cell if the cell continued to increase in size?
  5. What enters a cell?  What leaves the cell?
  6. What does the rate of exchange depend on?
  7. On the other hand, the cellís volume affects the rate of what?
  8. Look at Figure 10-2.  What happens to the cellís surface area to volume ratio as the cell increases in size?
  9. Read about ratio of surface area to volume ratio; explain why a large cell is similar to a large town and what problems would exist with things going in and out.
  10. What are the new cells called after a cell divides?
  11. What problem does cell division solve?  What does this solution allow for?

Chapter 10.2

1. What must every cell do before it divides?  Why is this important?

2. After the DNA divides, what is cell division like for prokaryotes?

3.  After the DNA divides, what is cell division like for eukaryotes?

4.  What is mitosis?  What is cytokinesis?

5.  Why is mitosis considered asexual?

6.  How are new cells formed in humans?

7.  Do all organisms have the same number of chromosomes?  How many are in a human cell?

8.  What happens to chromosomes at the beginning of cell division?

9.  Draw a chromosome.  Label and define the centromere and the sister chromatids.

What are chromosomes made of?

10.  What do the sister chromatids do when the cell divides?

11. What is interphase?

12.  What happens during the cell cycle?

13.  Complete the data table on the events of the cell cycle:

Name of phase

What happens?

 

 

 

 
 

 

 

 
 

 

 

 

 

 

 

 

 

 

14. What is the M stage divided into?

15.  Complete the data table on the phases of mitosis:

Phase of mitosis

What happens during this phase?

Colored drawing of a cell during this stage (label the DNA <chromatin>, centrioles, and spindles

 

 

 

   
 

 

 

   
 

 

 

   
 

 

 

   

16.  How does cytokinesis differ between an animal cell and a plant cell?  Draw a picture of each to illustrate the process.

Chapter 10.3

1.  Do all cells move through the cell cycle at the same rate?

2. Which cells don't go through cell division once they develop? 

3. Which cells continue to go through the cell cycle rapidly?  Why is this?

4. Read about controls on cell division and look at figure 10-7.  Explain what is happening in each diagram regarding the cells and their growth.

5.  How does this info from Q4 relate to what happens when the skin is cut or scraped?  Explain.

6.  What did biologists find in the early 1980's that relates to cell cycle?

7.  What is cyclin?  Why is this its name?  What type of biomolecule is cyclin?

8.  Is cyclin the only chemical to regulate the cell cycle?  Explain.

9. Make and complete a Venn diagram for internal vs. external regulators:

 

 

10.  Why is cell growth regulated so carefully?

11. How is a cell designated as being cancerous?

12.  What is a tumor?

13.  Metastasized cancer is when cancer spreads...how does this happen?

14.  Things that cause cancer are called carcinogens or carcinogenic.  What are some carcinogens?

15.  What do all cancers have in common?

16.  What is the p53 gene and how does it regulate the cell cycle?

17.  How is a damaged p53 gene associated with cancer?