Chapter 21 - Cell Cycle - 9

Biology Class 12
1. The period of divison during cell cycle is called _______ phase.


Biology Class 12
2. In yeast cells, cell cycle is completed in _______ minutes


Biology Class 12
3. During cell division, _______ sets of microtubules originate from each pair of centrioles.


Biology Class 12
4. The spread of tumor cells and establishment of secondary areas of growth is called _______.


Biology Class 12
5. Pairing of chromosomes starts in _______ stage of prophase-I.


Biology Class 12
6. In Down’s syndrome, chromosome no. _______ fails to segregarte


Biology Class 12
7. Individuals with Down’s syndrome have _______ chromosomes.


Biology Class 12
8. A person with klinefelter’s syndrome has an extra _______ chromosome.


Biology Class 12
9. The persons affected with Turner’s syndrome have _______ chromosomes.


Biology Class 12
10. Internal programme of events and sequence of morphological changes by which cell commits suicide is called _______.


Biology Class 12
11. The cell death due to tissue damage is called _______.


Biology Class 12
12. Division of the nucleus is called _______.


Biology Class 12
13. The microtubules of centrioles are made of a protein _______.


Biology Class 12
14. The most critical phase of mitosis which ensures equal distribution of chromatids in the daughter cells is called _______.


Biology Class 12
15. In human, S-phase takes about _______ hours.


Biology Class 12
16. Mongolism is also known as _______.


Biology Class 12
17. _______ phase precedes G2 phase.


Biology Class 12
18. The specialized microtuble structure including aster and spindle is called _______.


Biology Class 12
19. _______ is formed from vesicles which originate from golgi complex.


Biology Class 12
20. _______ is the special area of centromere where spindle fibers attach


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