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CELL CYCLE AND CELL DIVISION
Study Material
CELL CYCLE AND CELL DIVISION
Very Short Answer Questions
Q1. Between a prokaryote and a eukaryote, which cell has a shorter cell division time?
Q2. Among prokaryotes and eukaryotes. which one has a shorter duration of cell cycle?
Q3. Which of the phases of cell cycle is of longest duration?
Q4. Which tissue of animals and plants exhibits meiosis?
Q5. Given that the average duplication time of E.coli is 20 minutes. How much time will two E. coli cells take to become 32 cells?
Q6. Which part of the human body should one use to demonstrate stages in mitosis?
Q7. What attributes does a chromatid require to be classified chromosome? as a
Q8. Which of the four chromatids of a bivalent at prophase-I of meiosis can involve in cross over?
Q9. If a tissue has at a given time 1024 cells. How many cycles of mitosis had the original parental single cell undergone?
Q10. An anther has 1200 pollen grains. How many pollen mother cells must have
Q11. At what stage of cell cycle does DNA synthesis occur?
Q1. In which phase of meiosis are the following formed? Choose the answers from hint points given below. (a). Synaptonemal complex.(b). Recombination nodules, (c). Appearance/activation of Enzyme recombinase (d). Termination of chiasmata (e). Interkines
Q2. Mitosis results in producing two cells which are similar to each other. What would be the consequence if each of the following irregularities occurs during mitosis? (a). Nuclear membrane fails to disintegrate (b). Duplication of DNA does not occur (c
Q3. Explain prophase I of meiosis.
Q4. Mention the key features of meiosis.
Q5. Which division is necessary to maintain constant chromosome number in all body cells of multicellular organism and why?
Q6. Though redundantly described as a resting phase, interphase does not really involve rest. Comment.
Q1. Discuss on the statement Telophase is reverse of prophase.
Q2. What are the various stages of meiotic prophase-I? Enumerate the chromosomal events during each stage?
Q3. Differentiate between the events of mitosis and melosis.
Q4. Write brief note on the following: (a). Synaptonemal complex (b). Metaphase plate
Q5. Write briefly the significance of mitosis and meiosis in multicellular organism.
Q1. Name a stain commonly used to colour chromosome.
Q2. Name the pathological condition when uncontrolled cell division occurs.
Q3. An organism has two pairs of chromosomes (te.. chromosome number = 4). Diagrammatically represent the chromosomal arrangement during different phases of meiosis-II
Q4. Meiosis has events that lead to both gene recombinations as well as mendelian recombinations. Discuss.
Q5. Both unicellular and multicellular organisms undergo mitosis. What are the differences, if any, observed between the two processes?