Mitochondria

Question

Mitochondria:
A)are responsible for converting sunlight to chemical energy
B)are present only in photosynthetic organisms
C)have a double membrane
D)are responsible for protein synthesis

Accepted Answer

Mitochondria have a double membrane, with an outer membrane and an inner membrane that folds inward creating a series of cristae. The double membrane structure is unique to mitochondria and distinguishes them from other organelles such as the endoplasmic reticulum or Golgi apparatus. A) is incorrect because photosynthesis occurs in chloroplasts, not mitochondria. B) is incorrect as mitochondria are in all eukaryotic cells. D) is incorrect as protein synthesis occurs on ribosomes, not mitochondria.