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In plant cell, spindle is formed from...

In plant cell, spindle is formed from

A

Cytoplasm

B

ER

C

Nuclear membrane

D

Centrosome

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Question**: The question asks about the origin of spindle formation in plant cells during cell division. 2. **Cell Division Overview**: During cell division, specifically mitosis, spindle fibers are crucial for the segregation of chromosomes. They help in moving the chromosomes to opposite poles of the cell. 3. **Components of the Spindle**: Spindle fibers are protein structures that are formed from microtubules. These fibers are essential for the proper distribution of chromosomes. 4. **Centromere Role**: In plant cells, spindle fibers are formed from the area around the centromere, which is the region where sister chromatids are joined. The centromere plays a significant role in the attachment of spindle fibers to the chromosomes. 5. **Centrosome in Plant Cells**: Unlike animal cells, plant cells do not have centrioles. However, they do have a centrosome, which is the region from which spindle fibers emanate. The centrosome is located outside the nuclear envelope. 6. **Spindle Fiber Function**: The spindle fibers attach to the centromeres of the chromosomes and help in pulling the sister chromatids apart to opposite poles of the cell during anaphase. 7. **Conclusion**: Therefore, in plant cells, the spindle is formed from the centrosome, which is responsible for organizing the microtubules that make up the spindle fibers. ### Final Answer: In plant cells, the spindle is formed from the **centrosome**. ---
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TRUEMEN BIOLOGY ENGLISH-CELL CYCLE AND CELL DIVISION-MULTIPLE CHOICE QUESTIONS
  1. "Bouquet-stage" occur in which sub stages of prophase -I ?

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  2. Quiescent cells in the root tip cells are in which phase of cell cycle...

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  3. In plant cell, spindle is formed from

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  4. The best stage to view structure, size and to count the number of chro...

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  5. G(0) phase is

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  6. In which stage of cell division the nucleus looks like a ball of wool ...

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  7. Chromosomes at anaphase are of various shapes depending upon position ...

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  8. Suppose an organism has 5 pg of DNA in nucleus of its egg. How much DN...

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  9. Which is called direct cell division ?

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  10. Shape of chromosome can be best observed during

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  11. In Metaphase I, from each centromere of a chromosome, how many chromos...

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  12. Meiotic division occurring just at the time of gametogenesis is

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  13. The number of mitotic cell division required to produce 256 cells from...

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  14. Starting with a bacterium that divides once in half hour how many bact...

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  15. Cell division occurs throughout the body in animals. It occurs in loca...

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  16. In Anaphase-I

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  17. Mechanism of genetic continuity in mitosis is due to

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  18. Synaptonemal complexes is a nucleoprotein structure. It is visible or ...

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  19. During synapsis, the number of chromonemata /DNA in bivalent chromosom...

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  20. In meiosis, chromatids separate at

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