Lamina

Nucleolus

Nuclear pores

Cytoskeleton

Nuclear envelope

With the assistance of special proteins known as importins

Passive diffusion through nuclear pore complexes

Translocation through nuclear pore complexes while they are being translated by membrane-bound ribosomes

Proteins are only exported from the nucleus

All of these answers

The nucleus is studded with many openings called nuclear pore complexes

The nucleus is the site of assembly for ribosomal subunits

The nucleus is surrounded by multiple membranes