-Chloroplast Envelope: freely permeable outer membrane and a semi-permeable inner membrane; both primarily made of phospholipids and galactolipids. Between the membranes is the inter-membrane space.

-Stroma: the "cytosol" of the chloroplast; it is the medium within which the chloroplast's ribosomes, DNA, and enzymes are found.

Structure of the Chloroplast

Chloroplast Envelope,

Stroma,

Thylakoid Membrane,

Grana (Granum)