Which of the Following is NOT True About the Nuclear

Question

Which of the following is NOT true about the nuclear subcompartments?
A) Nucleoli, Cajal bodies, and speckles are examples of such subcompartments.
B) Each specialized subcompartment has a distinct biochemical environment and a selected set of proteins and/or RNA molecules.
C) The subcompartments are constitutively present in a cell except during nuclear divisions.
D) They are likely to be organized by a tethered network of macromolecules in gel-like structures.

Accepted Answer

Nuclear subcompartments such as nucleoli, interchromatin granule clusters (or speckles), and Cajal bodies carry out specialized functions using distinct sets of macromolecules organized in gel-like structures. These structures are highly permeable and highly selective at the same time. They are formed only when needed and are not constitutively present.