Mitochondria and chloroplasts are the
main energy transformers of cells
• Both organelles have DNA that direct the synthesis
of the polypeptides,
• internal ribosomes
• grow and reproduce as semiautonomous organelles.
Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings
Mitochondria are the sites of cellular respiration,
generating ATP from the catabolism of fuels in the presence of oxygen.
Almost all eukaryotic cells have mitochondria (1-10 microns)
Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings
• Chloroplasts (plastids) found in plants and
eukaryotic algae - green pigment chlorophyll
Photosynthesis - convert solar energy to chemical
energy and synthesize new organic compounds
from CO2 and H2O.
Amyloplasts, a type of plastid, store starch in roots and tubers.