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What is the difference between primary c...

What is the difference between primary constriction and secondary constriction?

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The centromere of chromosome is known as primary constriction. The chromatids of a chromosome may be attached together by the primary constriction region On the other hand, any other constricted region over a chromosome is called secondary constriction. The secondary constriction remains attached with the nucleolus Hence, it is also known as nucleolar organizer (NOR).
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SANTRA PUBLICATION-CELL DIVISION-Short Answer Type Questions
  1. At which stage of cell division, nucleus disappears and when it again ...

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  2. At which stage of cell division a chromosome becomes associated with t...

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  3. Where and when meiosis occurs?

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  4. Why do the cells divide?

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  5. Why mitosis is called indirect divison?

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  6. What is the significance of chromosomes in the cell?

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  7. What is the difference between primary constriction and secondary cons...

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  8. What are the different steps of cell cycle? What is G(0) stage? Where...

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  9. What are haploid, diploid and triploid states of chromosome?

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  10. Describe the chemical structure of chromosome.

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  11. Describe the characteristics of viral chromosome and bacterial chromos...

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  12. What are the differences between prokaryotic and eukaryotic chromosome...

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  13. Mention the three important characteristics of meiosis cell division.

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  14. Why meiosis is considered as reductional division?

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  15. Give three importance of cell division.

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  16. State about the importance of chromosome.

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  17. Give the differences between autosome and sex chromosome.

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  18. State the differences between centromere and chromomere.

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  19. According to ‘Finch and Klug’, state the solenoid model of nucleosome.

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  20. What are the differences between euchromatin and heterochromatin.

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