Question

what is the main function of the mitochondria in a plant cell?
to break down sugar and release energy that the cell can use
to make proteins
to control which substances enter and leave the cell
to use energy from sunlight to make sugar

Explanation:

To determine the main function of mitochondria in a plant cell, we analyze each option:

• "to break down sugar and release energy that the cell can use": Mitochondria are the powerhouses of the cell, performing cellular respiration to break down glucose (sugar) and release energy (ATP) for the cell's use. This matches the function of mitochondria.
• "to make proteins": Ribosomes are responsible for protein synthesis, not mitochondria.
• "to control which substances enter and leave the cell": The cell membrane (or plasma membrane) regulates the movement of substances in and out of the cell, not mitochondria.
• "to use energy from sunlight to make sugar": Chloroplasts in plant cells use sunlight to perform photosynthesis and make sugar (glucose), not mitochondria.

Answer:

to break down sugar and release energy that the cell can use