The structure present inside the nucleus resp | vedclass

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(C) The $Nucleolus$ is a spherical structure present inside the nucleus that is not membrane-bound. It is the primary site for the synthesis of riboso

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Nucleolus

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(C) The $Nucleolus$ is a spherical structure present inside the nucleus that is not membrane-bound. It is the primary site for the synthesis of ribosomal $RNA$ $(rRNA)$ and the assembly of ribosomal subunits.$Mesosomes$ $\rightarrow$ Infoldings of the plasma membrane in prokaryotes involved in $DNA$ replication,respiration,and cell wall formation.$Nucleoplasm$ $\rightarrow$ The dense,protein-rich fluid (matrix) enclosed within the nuclear envelope.$DNA$ $\rightarrow$ The hereditary genetic material found within the nucleus.

List-$I$	List-$II$
$(1)$ Metacentric	$(a)$ Centromere at the terminal end
$(2)$ Sub-metacentric	$(b)$ Centromere close to the end
$(3)$ Acrocentric	$(c)$ Centromere slightly away from the middle
$(4)$ Telocentric	$(d)$ Centromere in the middle

The structure present inside the nucleus responsible for ribosomal unit formation is

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.......... is a site for active ribosomal $RNA$ synthesis.

Match the following and select the correct option:
List-$I$ List-$II$
$(1)$ Metacentric $(a)$ Centromere at the terminal end
$(2)$ Sub-metacentric $(b)$ Centromere close to the end
$(3)$ Acrocentric $(c)$ Centromere slightly away from the middle
$(4)$ Telocentric $(d)$ Centromere in the middle

$DNA$ genetic material occurs by itself in lower organisms and combined with proteins as nucleoproteins in higher organisms. The nucleoprotein is organized in higher forms to form

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