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REVISION QUESTIONS: CELL BIOLOGY 2 Which one of the following is most likely to be true: To see plant cells with a microscope you usually need a magnification of about (a) x5, (b) xl0, (c) xl00, (d) xl000? 3 Which one of the following best describes the function of a cell membrane? (a) It keeps the cell in shape. (b) It controls the substances entering and leaving the cell. (c) It controls the substances entering the cell. (d) It supports the cell structures. 4 Which of the following structures are (a) in plant and animal cells, (b) in plant cells but not in animal cells? cell wall, cytoplasm, cell membrane, mitochondria, nucleus, central vacuole, chromosomes, cell sap 5 The drawings below show stages in cell division but in the wrong order. What is the most likely sequence of events? a b c d e f g 6 Select the most appropriate words from the list below to complete the following paragraph: If a cell develops in such a way that it does one particular job very efficiently, it is said to be …….. . Such a cell is also said to be …… to its function. A nerve cell is ….. for conducting impulses. It can do this efficiently because of its ……and the chemical reactions in its ….. shape, vacuole, adapted, cytoplasm, size, specialised, mature, mitochondria Try these hyperlinked multiple choice quizzes about mitosis and meiosis: 1. Quiz 1 2. Quiz 2 3. Quiz 3 4. Questions 7 – 10 refer to the following structure: 7. What is the ‘entire structure’ called (1 mark)? 8. What is indicated by Number 2 (1 mark)? 9. During which phase of mitosis would this structure first appear (1 mark)? 10. What is the function of the centrioles in an animal cell ( 1 mark)? IDENTIFY STAGES OF MITOSIS 11. ……………….. 12. 13. 14. 15. Explain briefly why cancer is considered to be a disease of the cell cycle Include the following terms in your answer: Specific cell cycle regulators Checkpoints ( 3 marks). 16. Compare and contrast mitosis and meiosis (5 marks) Property MITOSIS MEIOSIS When does DNA replication occur? Number of divisions of genetic material Number of daughter cells Genetic composition of daughter cells Role in the animal body 17. Which process occurs in meiosis but not mitosis? A. Chromosome condensation B. Chromatid separation C. Crossing over D. Chromosome movement to opposite poles 18. During which phase of meiosis does crossing over occur? A. Prophase I B. Prophase II C. Metaphase I D. Metaphase II 19. A cell with a diploid number of 24 goes through meiosis. How many chromosomes are present in each daughter cell? A. 24 B. 12 C. 48 D. 6 20. Homologous chromosomes move to opposite poles during which phase of meiosis? A. Anaphase 1 B. Anaphase II C. Telophase I D. Telophase II