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Question

What are asters and spindle fibres.

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Answer

Asters are two star-like structures radiating fibres from the centrosome. They help in locating spindle and trigger cleavage of cytoplasm. Spindle fibres are formed from microtubules during cell division. They pull the chromosomes apart and bring them at the poles. These are broader in the middle and narrower at the poles.

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Consider the following statements: (𝑎) Ribosomes are the protein factories of the cell. (𝑏) The proteins formed are transported by the Golgi complex to different parts according to their requirements. (𝑐) Mitochondria provide energy for the wörking of the cell. (𝑑) Lysosomes are the suicidal bags where dead and damaged organelles are destroyed. Answer the following questions based on the above information: (𝒊) What would happen if any one of the above mentioned organelles are absent in the cell? (𝒊𝒊) What values shown by the cell organelles can be related to humans? (𝒊𝒊𝒊) Give one situation in your everyday life where such values are exhibited.

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