Question

Pore size of nuclear membrane is

• A. 100 $\dot{A}$
• B. 200 $\dot{A}$
• C. 300 $\dot{A}$
• D. 400 $\dot{A}$

Answer 1

The correct option is A 100 $\dot{A}$

The nuclear pore complexes have a range of sizes and it varies from species to species around 50 to 100 Angstrom in vertebrates. Nuclear pore complexes are basically pores or complexes present in the nuclear membrane as the membrane surrounding the nucleus is not continuous. these complexes allow the passage of molecules to and from the membrane. For example the passage of RNA from nucleus to cytoplasm and the movement of ribosomal proteins from cytoplasm to nucleus occurs via these complexes. The size of these pore complexes are important as this confers specificity to the size of the molecules passing through them.