Kinetochore: Microtubule Attachment Site
The structure responsible for attaching microtubules and facilitating chromosome separation during cell division is the Kinetochore.
Understanding Kinetochore Function
- Kinetochores are complex protein structures assembled on the centromeric DNA of each sister chromatid.
- They serve as the critical connection point (attachment site) for spindle microtubules originating from opposite poles of the cell.
- During cell division (mitosis and meiosis), the coordinated pulling forces exerted by microtubules attached to the kinetochores are essential for aligning chromosomes at the metaphase plate and then separating them into daughter cells.
Why Other Options Are Incorrect
- Telomere: Located at the ends of chromosomes, telomeres protect the chromosome ends but are not involved in microtubule attachment for separation.
- Chromatin: This is the general term for the DNA-protein complex making up chromosomes. Microtubules do not attach directly to the bulk chromatin.
- Centrosome: The primary microtubule-organizing center in animal cells, it initiates spindle formation but is not the direct attachment site on the chromosome itself.
Therefore, the kinetochore is the specific attachment site for microtubules that enables chromosome separation during cell division.
Similar Questions
- In Polymerase Chain Reaction (PCR) primers are used to provide:
- To detect specific proteins in a sample we use:
- The most commonly used stain for visualising/observing the DNA fragments is:
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- R$_f$ value depends on:
- Barr body is an example of:
Repeated sequence TTAGGC in humans is present at :
AATCCG- The genetic material of a prokaryotic cell is present in:
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Important Questions from Mixed Topic (CUET PG)
- Who was the founder of Bolshevik Communist party?
- What is the key guide to statecraft in the realist tradition?
- Chronologically arrange the events in the Cold War period.
A. Berlin Wall is constructed
B. Communist China joins the UN
C. Soviet invasion of Czechoslovakia
D. Berlin Blockade
Choose the correct answer from the options given below: Morgenthau's principles of political realism are:
A. Politics is rooted in permanent and unchanging human nature which is basically self centred, self-regarding and self-interested
B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
