NEET BIOLOGY

Detailed explanation-1: -The space between the membranes is called the perinuclear space. It is usually about 10–50 nm wide. The outer nuclear membrane is continuous with the endoplasmic reticulum membrane. The nuclear envelope has many nuclear pores that allow materials to move between the cytosol and the nucleus.

Detailed explanation-2: -A nuclear pore is a part of a large complex of proteins, known as a nuclear pore complex that spans the nuclear envelope, which is the double membrane surrounding the eukaryotic cell nucleus.

Detailed explanation-3: -The nuclear membrane serves to separate the chromosomes from the cell’s cytoplasm and other contents. An array of small holes or pores in the nuclear membrane permits the selective passage of certain materials, such as nucleic acids and proteins, between the nucleus and cytoplasm.

Detailed explanation-4: -Nuclear Pores. All transport between the nucleus and the cytoplasm occurs through large protein channels that are embedded in the nuclear membrane. These channels, which are called nuclear pore complexes (NPCs), are composed of proteins referred to as nucleoporins.

Detailed explanation-5: -The nucleus is surrounded by a nuclear envelope composed of two membranes. The nuclear envelope is dotted with thousands of nuclear pores, which allow material to move into and out of the nucleus.