Presentation on theme: "Chapter 9 Review! Cellular Reproduction. Directions Work in a group of 3-4 students We will go group by group to answer a question. If a group cannot."— Presentation transcript:
Chapter 9 Review! Cellular Reproduction
Directions Work in a group of 3-4 students We will go group by group to answer a question. If a group cannot answer a question correctly, the first group to raise their hand and is called on may answer the question. There is no penalty for guessing. Team with the most points at the end wins! I may deduct points for disruptive behavior …
Here we go … Good luck!
Which of the following explains why a cell's size is limited? a. Volume increases faster than surface area. b. Surface area increases faster than volume. c. Homeostasis is disrupted by a cell that is too large. d. Both a and c D
Why is the synthesis stage called this? Because DNA is being replicated
Which of the graphs in Figure 9-3 shows the correct changes in the amount of DNA in a cell as it moves through one cell cycle? C AA B CD
The typical growth period of a cell occurs during which stage of the cell cycle? G1
growth : G1 :: a. mitosis : meiosis b. cytokinesis : M c. mitochondria replication : S d. DNA copying : S
A typical human cell contains 46 chromosomes. After mitosis and cell division, each of the two new cells formed from the original cell a. gets 23 chromosomes. b. grows new chromosomes from existing DNA. c. gets a complete set of 46 chromosomes. d. None of the above
The longest phase of the cell cycle is … Interphase
Mitosis is a process by which the … Nucleus divides
What is the product of cell division? Two new cells – identical genetic material
Which of the following shows the correct sequence of the cell cycle? a. C M G1 S G2 c. G1 S G2 M C b. S G1 G2 M C d. None of the above
List the phases of mitosis in proper order Prophase, metaphase, anaphase, telophase
Figure 5 shows which phase of mitosis? Telophase
Figure 3 shows which phase of mitosis? Metaphase
Figure 1 shows which phase of mitosis? Anaphase
This is a picture of which phase of mitosis? Prophase
By the end of prophase, each of the following has occurred except a.tighter coiling of the chromosomes b.breaking down of the nuclear envelope c.disappearing of the nucleolus d.lining up of chromosomes in the cell
What is the role of the spindle in mitosis? It helps separates the chromosomes
How is the alignment of chromosomes, shown in Figure 9-4, on the equatorial plate of the cell maintained? a.They are always located there, since that is where the nucleus was. b.Tension between opposite spindle fibers pulls them there. c.The pressure of the cytoplasm moves them there. d.The chromosomes are attracted to each other and meet there.
A stem cell has potential medical uses because … It is not specialized in structure or function
Which of the cells depicted in the line graph in Figure 9-2 are most likely cancerous? A
If cancer is present, what is the likely explanation for what happened to the cells depicted in the curves labeled B and D in Figure 9-2? a. They thrived with the cancerous cells. b. They were harmed by radiation therapy. c. They died off due to natural causes. d. They died off because the cancerous cells deprived them of nutrients.
The cell cycle is regulated by… Cyclins
Cancer cells can reproduce more quickly because they… Spend less time in interphase
Cancer is caused by… a. Cell-membrane damage c. Mutation b. Metabolic poisoning d. Immune-system damage
Which of the following is a factor that can stop normal cells from growing? a.contact with other cells b.growth factors c.a cut in the skin d.cyclin that has been taken from a cell in mitosis
Look at Figure Which diagram shows cancer cells? How do you know?
Explain how cancer cells are different from normal cells. Then, relate these characteristics to the diagrams in Figure
Look at the cancer cells shown in Figure What can happen if these cells are left untreated?
Explain the role that p53, a gene that regulates DNA synthesis, might have had in the growth and division of the cells shown in each diagram in Figure 10-1.
How might the cancer cells shown in Figure 10-1 be prevented from doing more harm to the organism of which they are a part?
Our goal … Is for EVERYONE to earn an 80% (a B or better!) on the exam!