In a typical diagram of a eukaryotic cell, structure D is labeled as the organelle responsible for energy production. Which organelle does structure D most likely represent?

• A. Lysosome
• B. Golgi apparatus
• C. Nucleus
• D. Mitochondrion

Answer: (D)

Verified step by step guidance

1. Step 1: Begin by identifying the primary function of the organelle responsible for energy production in eukaryotic cells. This organelle is known for generating ATP (adenosine triphosphate), the cell's main energy currency.
2. Step 2: Recall that the mitochondrion is the organelle responsible for cellular respiration, a process that converts glucose and oxygen into ATP. This makes it the powerhouse of the cell.
3. Step 3: Compare the functions of the other organelles listed in the options: Lysosome (involved in digestion and waste removal), Golgi apparatus (involved in protein modification and transport), and Nucleus (responsible for storing genetic material and regulating cellular activities). None of these are directly involved in energy production.
4. Step 4: Understand that in a typical cell diagram, the mitochondrion is often depicted as a bean-shaped structure with inner folds called cristae, which increase the surface area for ATP production.
5. Step 5: Conclude that structure D most likely represents the mitochondrion, as it is the organelle responsible for energy production in eukaryotic cells.