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UNIVERSAL EDUCATION ICSE GRADE X SUBJECT : BIOLOGY _____________________________________________________________________________ CHAPTER 2 - Cell cycle, Cell division and structure of chromosome. A. Name the following: 1. Acts as bearer of heredity unit. Chromosome. 2. The longest phase of cell cycle. Interphase. 3. Number of cells produced at the end of mitosis. Two. 4. Number of cells produced at the end of meiosis. Four. 5. The complex consisting of DNA strand and a core of histones. Nucleosome. 6. A region of plant body where cell division occurs very actively. Tips of the roots and stems. 7. Chromosome appears thread like. Prophase, telophase. 8. The type of cell division which occurs in the cell of the reproductive organ. Meiosis. 9. The phase in which the spindle fibers start contracting. Anaphase. 10. The phase in which the chromosome gets attached to spindle fiber. Metaphase. 11. The nuclear changes that occur during cell division. Karyokinesis. 12. Highly condensed coiled chromatin fiber. Chromosome. 13. Complex of DNA and histones. Nucleosome. 14. The point of attachment of chromatids. Centromere. 15. Repeating units that constitute the DNA strands. Nucleotides.
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