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Solution


Q.

Nuclear envelope is a derivative of                  [2015]
1 microtubules  
2 rough endoplasmic reticulum  
3 smooth endoplasmic reticulum  
4 membrane of Golgi complex  

Ans.

(2)

Recent developments have shown that nuclear membrane is derived from rough endoplasmic reticulum. During cell division, nuclear membrane is disintegrated. The nuclear envelope transmembrane proteins are absorbed in the RER. Once the division is completed, RER reassembles the nuclear envelope.