It is supported by the nuclear lamina, a network of protein filaments. The membrane is dotted with nuclear pores. Chromosomes exist in different states throughout the cell cycle. Highly condensed chromosomes occur only for a brief period of time. For the rest of the cell cycle they appear as extended threads called chromatin.
Chromatin attaches to the nuclear envelope or lamina.
Golgi apparatus- receives, modifies, and dispatches proteins and lipids from the ER to other destinations. Both are sorrounded by double membranes. Chloroplasts have a fluid-filled space called the stroma, flattened sacs, called thylakoids are stacked into structures called grana. Chlorophyll is contained within the thylacoid membranes. Mitochondria have a fluid-filled space called the matrix.