Watson has calculated the nuclear pores of th | vedclass

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(A) The nuclear envelope consists of two parallel membranes with a space between them called the perinuclear space. The outer membrane usually remains

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$5$ percent

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(A) The nuclear envelope consists of two parallel membranes with a space between them called the perinuclear space. The outer membrane usually remains continuous with the endoplasmic reticulum and also bears ribosomes on it. At a number of places, the nuclear envelope is interrupted by minute pores, which are formed by the fusion of its two membranes. These nuclear pores are the passages through which movement of $RNA$ and protein molecules takes place in both directions between the nucleus and the cytoplasm. Watson calculated that these nuclear pores occupy approximately $5$ percent of the total surface area of the nucleus.

Watson has calculated the nuclear pores of the mammalian cells to be ...... of the total surface area of the nucleus.

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