Question

which statement about mitochondria is correct?
a mitochondria are membrane - bound organelles found only in eukaryotic cells.
b mitochondria are fluid - filled organelles formed by proteins designed to store energy.
c mitochondria are organelles with a double membrane found only in prokaryotic cells.
d mitochondria are structured organelles responsible for protein synthesis.

Explanation:

Mitochondria are membrane - bound organelles found only in eukaryotic cells. They have a double - membrane structure and are the powerhouses of the cell, generating ATP. Protein synthesis occurs in ribosomes. Prokaryotic cells lack membrane - bound organelles like mitochondria. Mitochondria are not fluid - filled organelles formed by proteins for energy storage.

Answer:

A. Mitochondria are membrane - bound organelles found only in eukaryotic cells.