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MCAT Question A Day - 7/20/13 - Answer!

Which organelles are not found in bacterial cells?

A.  Endoplasmic reticulum
B.  Mitochondria
C.  Chloroplasts
D.  All of the above

The correct answer is (D). All the choices are membrane-bound organelles. Since bacteria have prokaryotic cells, no membrane-bound organelles are present. The functions carried out by endoplasmic reticulum, mitochondria, and chloroplasts in eukaryotes take place in the cytoplasm of prokaryotes.