ACIE Biology Guided reading: Chapter 1: Cell Structure
AICE Biology Guided Reading: Chapter 5 Nuclear Division
Directions: Please answer all questions on a separate sheet of paper. You may handwrite (NEATLY) in blue or black ink or type your answers. Complete these questions by Tuesday, October 17, 2017. This assignment is worth 25 points.
Chromosomes:
1. As you are reading the chapter, answer SAQ’s (self assessment questions) 5.1 & 5.2 (2pt)
2. What is a homologous pair of chromosomes? How many homologous pairs of chromosomes do humans have? How are homologous pairs the same? How do they differ? (2pt)
3. Distinguish between diploid & haploid cells. In what type of cell would you find each condition? (1pt)
4. Draw a chromosome and label: chromatid, centromere, telomere, one example of a locus (1pt)
Cell Cycle:
5. List & describe each of the three phases of the cell cycle, including G1, S & G2 phases. (2pt)
6. Discuss the biological significance of mitosis. (2pts)
7. Sketch each of the 4 phases of mitosis & briefly describe what is happening. (4pt)
8. Differentiate cell division in prokaryotes & eukaryotes. (1pt)
9. Differentiate cytokinesis in animal & plant cells. (1pt)
10. What are telomeres and why are they important? (1pt)
11. What are stem cells and how does their “potency” vary? What does this mean? (2pts)
Cancer:
12.What is cancer? (1pt)
13. What are carcinogens and how do they affect the cell cycle? (1pt)
14. Differentiate between primary and secondary growth of cancer cells, including distinctions between benign and malignant tumors and metastatic growth. (2pt)
Problem (2pts):
1. This graph shows the percent of time a human liver cell spends in each stage in the cell cycle of a human liver cell. Use the circle graph to answer the following questions:
[pic]
a. If it takes a human liver cell about 22 hours to complete one cell cycle, how many hours would a typical liver cell spend on the process of DNA replication? Show your work.
b. If you observed an onion root tip under the microscope, which of the stages of the cell cycle would you expect more of the cells to be in at any given time-interphase or mitosis? Explain.
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