Question

In a eukaryotic cell, the nucleus has:

• A. One membrane with pores
• B. Two membranes with pores
• C. Two membranes with pores through which substances do not pass
• D. Two membranes with pores through which macromolecules may pass

Answer 1

The correct option is D Two membranes with pores through which macromolecules may pass

In a eukaryotic cell. the nucleus is a defined central region. It is enveloped by a nuclear membrane which is made up of two layers. This membrane has a large number of pores (having a diameter of 200-800 angstroms). The pores facilitate the movement of substances between nucleus and cytoplasm.

Hence, the correct option is D.