Chloroplast
(a) This chloroplast cross-section illustrates its elaborate inner membrane organization. Stacks of thylakoid membranes compartmentalize photosynthetic enzymes and provide scaffolding for chloroplast DNA. (b) The chloroplasts can be seen as small green spheres.
Source
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"OpenStax College, Eukaryotic Origins. October 16, 2013."
http://cnx.org/content/m44614/latest/Figure_23_01_02.jpg
OpenStax CNX
CC BY 3.0.
