Final answer:
The nuclear lamina is composed of intermediate filaments, specifically long fibrous subunits of a protein called keratin.
Step-by-step explanation:
The nuclear lamina is composed of intermediate filaments.
Intermediate filaments are one of the three types of protein fibers that form the cytoskeleton, along with microtubules and microfilaments. They are made up of long fibrous subunits of a protein called keratin.