Organelle consists of a double membrane with pores that surrounds the nucleus of a cell? cell wall nuclear membrane/envelope Golgi apparatus endoplasmic reticulum
The Correct Answer and Explanation is:
The correct answer is nuclear membrane/envelope.
The nuclear membrane (also called the nuclear envelope) is a double-layered membrane that surrounds the nucleus in eukaryotic cells. It serves as a protective barrier, separating the contents of the nucleus from the cytoplasm, and plays a critical role in regulating what enters and exits the nucleus.
The nuclear membrane consists of two lipid bilayers: an inner membrane and an outer membrane. These two membranes are continuous with each other at certain points and have pores, known as nuclear pores, embedded within them. These pores regulate the transport of molecules, such as RNA and ribosomal subunits, in and out of the nucleus. This selective permeability is essential for maintaining the proper environment within the nucleus for processes like DNA replication and transcription.
The nuclear membrane is connected to the endoplasmic reticulum (ER), another important organelle, which plays a role in protein and lipid synthesis. The outer membrane of the nuclear envelope is continuous with the rough ER, which is studded with ribosomes, while the inner membrane is associated with nuclear lamina, a network of protein filaments that provide structural support to the nucleus.
The nuclear envelope also undergoes changes during cell division. During mitosis, the nuclear envelope disassembles, allowing the chromosomes to be separated, and later reassembles around the daughter nuclei.
In summary, the nuclear membrane or envelope is a vital structure in the cell, serving both protective and regulatory functions for the nucleus, ensuring proper cellular processes while maintaining the integrity of genetic material.
