Question

The nuclear envelope that consists of two parallel membranes are separated by perinuclear space.It is about?
A. 50-100 nm
B. 10-50 nm
C. 10-50 µm
D. 100-150 µm

Answer 1

A double membrane consisting of an outer and an inner phospholipid bilayer is the nuclear shell. The thin space between the two layers is connected to the rough endoplasmic reticulum (RER) lumen, and an extension of the outer face of the RER is the outer layer.

Complete Answer:
- The perinuclear space is the lumenal space that separates the nucleus from the cytoplasm between the inner and outer nuclear envelope bilayers. The space width is between 100 A and 500 A, or 10-50 nm, respectively.
- Perinuclear space refers to the distance between the nuclear envelope's inner and outer membranes. The perinuclear space of most cells is about 20-40 nm wide.
- The endoplasmic reticulum lumen is therefore also contiguous to perinuclear space, since the endoplasmic reticulum is contiguous to the outer membrane of the nuclear envelope. If it is discovered that the endoplasmic reticulum is connected to the nuclear membrane, it is therefore consistent to say that the endoplasmic reticulum lumen is continuous with the nuclear membrane's perinuclear space.
- Space is used to isolate the nucleus from the cytoplasm surrounding it.As there are two membranes in the nuclear envelope, each with a standard unit membrane arrangement, each of these enclose a flattened PNS sac connected to the nuclear pore sites.
- With the space of the rough endoplasmic reticulum, the distance between the inner and outer membranes is also ceaseless, and the outermost membrane has ribosomes attached to it as it is continuous with the rough endoplasmic reticulum.
- The inner nuclear membrane acts as the principal residence for various proteins of the inner nuclear membrane. At the position of the nuclear pore complex insertion, the inner and outer nuclear membranes are bonded.
- The void or distance between the two membranes marking the nuclear envelope is the perinuclear cistern.

The correct Answer is option (B) 10-50 nm.

Note: It is a barrier that distinguishes nuclear processes from cytoplasmic processes including translation, such as transcription. The selective transport of macromolecules via nuclear pore complexes between the two compartments of a eukaryotic cell makes it possible to control gene expression, for example, at pre-mRNA splicing and mRNA degradation levels not seen in simpler prokaryotic cells.