$A$ : The nucleus of a plasma cell has a cart-wheel appearance.
$R$ : The nucleus contains peripheral clumps of heterochromatin.

  • A
    Assertion and Reason both are correct and Reason is the correct explanation of Assertion.
  • B
    Assertion and Reason both are correct but Reason is not the correct explanation of Assertion.
  • C
    Assertion is correct,but Reason is incorrect.
  • D
    Both Assertion and Reason are incorrect.

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The nuclear envelope consists of two parallel membranes with a space between them called the perinuclear space,which is about:

Which of the following is associated with the synthesis of ribosomal $RNA$ $(rRNA)$?

Who coined the term "chromosome"?

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