Question

the blank membrane surrounds the nucleus and is made of two lipid bilayers.

Explanation:

The nuclear membrane (also known as the nuclear envelope) surrounds the nucleus in eukaryotic cells. It is a double - membrane structure, meaning it is made of two lipid bilayers. This structure separates the genetic material (DNA) inside the nucleus from the cytoplasm. It has nuclear pores that regulate the movement of molecules in and out of the nucleus.

Answer:

nuclear