Which organelle is primarily responsible for energy production in eukaryotic cells, and would be visible as an oval-shaped structure in a low magnification micrograph of the ovary?

• A. Endoplasmic reticulum
• B. Mitochondrion
• C. Golgi apparatus
• D. Lysosome

Answer: (B)

Verified step by step guidance

1. Understand the function of each organelle listed: the endoplasmic reticulum is involved in protein and lipid synthesis, the Golgi apparatus modifies and packages proteins, lysosomes are responsible for digestion and waste removal, and mitochondria generate energy for the cell.
2. Recall that energy production in eukaryotic cells primarily occurs through cellular respiration, a process that takes place in the mitochondria.
3. Recognize that mitochondria are typically oval-shaped organelles and can be seen under low magnification in micrographs, especially in energy-demanding tissues like the ovary.
4. Eliminate other options based on their functions and typical appearances: the endoplasmic reticulum and Golgi apparatus have different shapes and roles, and lysosomes are smaller and less prominent in micrographs.
5. Conclude that the mitochondrion is the organelle responsible for energy production and matches the description of an oval-shaped structure visible in the ovary micrograph.