The nucleolus is the site of assembly of ribosomes. The nucleoplasm is the rest of the nucleus not included above. Cytoplasm is the rest of the cell including all the organelles and ground substance. Energy transforming organelles are the chloroplast and mitochondria. These organelles possess two membranes.
Chloroplasts are unique to the photosynthetic protista and plants.
They are responsible for capturing radiant energy and converting it to chemical energy. The structure of the chloroplasts includes the outer membrane and a system of inner membranes organized into stacks called grana. The inner portion without the stacks is called the stroma. Grana stacks are made of disk like structures piled on top of one another. These disks are called thylakoid disks.