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Chloroplasts are double membrane organelles with a smooth outer membrane and an inner membrane that is folded into disc-shaped sacs called the thylakoid. Thylakoids contain chlorophyll and other pigments (red, orange, yellow, brown) and are found in stacks
called granum (grana, plural.)

This organelle is used to
A. perform the process of cellular respiration.
B. expel O2.
C. create ATP.
D. convert solar energy into chemical energy.