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1. Which of the following describe the nuclear envelope?
a. It is continuous with the endomembrane system
b. It is continuous with the nucleolus
c. It is continuous with the cell membrane
d. It contains a cell membrane
2. During the cell cycle, when are chromosomes partitioned to daughter cells?
a. G1 phase
c. M phase
b. G2 phase
d. S phase
3. How do cancer cells differ from normal cells?
a. invasiveness only – many normal cell types grow in an uncontrolled
fashion
b. interphase and M phase
c. uncontrolled division and invasiveness
d. uncontrolled division only – many normal cell types are invasive
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- 1. Compare and contrast at least two reasons cell division is important for unicellular (single-celled) and multicellular organisms. 2. What is the role of growth factors? 3. Cells divide, differentiate, or die. What is differentiation? 4. What is apoptosis? Explain its purpose.5. Organisms maintain the right number of cells by regulating the cell cycle. What are “cell cycle regulators?”Which of the following is true of normal adult cells but NOT cancer cells? A. Cell death after a finite number of cell divisions B. Contact with other cells increases likelihood of division C. Large amount of telomerase present D. Do not care about cell density while culture1. Which of the following is NOT an importance of mitosis? a.It facilitates growth of single fertilized egg to an individual. b.It heals wounds and replaces damaged or lost organs through regeneration c.It ensures equal distribution of nucleic material down to each daughter cell. d.It produces new chromosome combinations. 2. Why are cell cycle control points are so important? a.They help prevent cells with damaged DNA from dividing b.They determine how quickly a cell’s DNA gets copied c.They ensure that mitosis occurs continuously in all body cells d.They ensure that metaphase always follow anaphase 3. Which component of the plasma membrane allows the immune system to differentiate between body cells and foreign cells or tissues? a.integral proteins b.carbohydrates c.cholesterol d.peripheral proteins e.phospholipids 4. Cyanide is a chemical that affects the function of mitochondria affecting the energy processing of…
- 1.Colchicine is a type of drug that inhibits the microtubule formation during the cell division. Let’s say that the onion root tip (a place where most of the plant’s cells divide) was submerge in colchicine solution. a. How do you think will be the cell’s respond? Will it continue its cell division? Why or why not? b. Let’s say that the cells in onion root tip treated with colchicine were not halted at spindle checkpoint. What do you think will happen during the division?1. Which of the following is NOT an importance of mitosis? a.It facilitates growth of single fertilized egg to an individual. b.It heals wounds and replaces damaged or lost organs through regeneration c.It ensures equal distribution of nucleic material down to each daughter cell. d.It produces new chromosome combinations. 2. Why are cell cycle control points are so important? a.They help prevent cells with damaged DNA from dividing b.They determine how quickly a cell’s DNA gets copied c.They ensure that mitosis occurs continuously in all body cells d.They ensure that metaphase always follow anaphase11. What moves the chromatids during mitosis? 12. What anchors the spindle? 13. What are the four phases of mitosis? 14. How many daughter cells are created from mitosis and cytokinesis? 15. During what phase does cytokinesis begin? 16. If a human cell has 46 chromosomes, how many chromosomes will be in ea daughter cell?
- The phases of cell cycles in order are O a. Metaphase, anaphase, telophase, interphase, prophase and cytokinesis O b. Metaphase, anaphase, interphase, prophase, telophase and cytokinesis O c. Interphase, telophase, cytokinesis, prophase, metaphase and anaphase O d. Cytokinesis, telophase, anaphase, metaphase, prophase and interphase O e. Anaphase, telophase, cytokinesis, interphase, prophase and metaphase O f. Interphase, prophase, metaphase, anaphase, telophase and cytokinesis g. Prophase, interphase, metaphase, anaphase, telophase and cytokinesis What is the purpose of using sodium bicarbonate (NaHCO3) in the photosynthesis experiment? a. None of the other choices is valid O b. To provide dissolved dissolved 02 O c. To provide dissolved dissolved CO2 O d. To provide dissolved water2. Two examples of chemotherapeutic drugs (drugs used to treat cancer) and their cellular actions are listed below. Explain why each drug could be fatal to a cell. a. Vincristine: damages the mitotic spindleOne difference between cancer cells and normal cells is that cancer cells a. are always in the M phase b. are arrested at the S phase of the cell cycle c. are unable to synthesize DNA d. continue to divide even when they are tightly packed together
- 8. Select the statement that is FALSE: * O Some cells, like stem cells or skin cells, are constantly cycling, or progressing through the cell cycle. O Some cells, like newborn neurons, exit the cell cycle and enter GO, because they do not divide. O Some cells do not regularly divide but can be stimulated to divide by chemical signals called growth factors. Only some cells derive from a mitosis event.. A metastasis is : * A tumor that can grow indefinitely 1 pc The spread of calls from a tumor to a region of the body away from a primary tumor8. Cell radiosensitivity depends on the part of the cell cycle cell is in. The most sensitive phase is: a. G₂ phase b. late S phase c. mid-S phase d. Mitosis plus late G₁ and early S phase e. the whole interphase 9. Interphase death affects cells at lower dose compared to other cells: a. cells that are not highly mitotic b. cells that are highly mitotic 10. Which of the acute radiation syndromes is threshold dose dependent? a. bone marrow syndrome b. hemopoietic syndrome d. nervous system syndrome e. all of the above 11. What is the estimated SED 50 for humans? c. gastrointestinal syndrome a. 250-400 Rads b. 600 R c. 1,000 R d. 10,000 R e. above 10,000 RWhich of the following traits are common to many cancer cells (more than one answer may be correct)A. Uncontrolled growth and divisionB. Chromosomes abnormalitiesC. Absence of a cytoskeletonD. Decreased adhesion to other cells