Question

the mitochondria is know as the energy powerhouse of the cell because (1 point)
it is where most of photosynthesis happens.
it is where most of cellular respiration happens.
it is where the cell grows the most.
it is where energy is stored.

Explanation:

• Photosynthesis occurs in chloroplasts, not mitochondria, so the first option is incorrect.
• Mitochondria are the site of most cellular respiration, which produces ATP (energy) for the cell, so this matches the "powerhouse" description.
• Cell growth is a general process not specific to mitochondria, so the third option is wrong.
• Energy storage (e.g., in the form of glycogen or fat) is not the main function of mitochondria; they produce energy, not primarily store it, so the fourth option is incorrect.

Answer:

B. it is where most of cellular respiration happens. (Note: Assuming the options are labeled A, B, C, D with the second option being B as per typical multiple - choice formatting. If the original labeling is different, adjust the label accordingly while keeping the text "it is where most of cellular respiration happens.")