Which organelles would be present in high numbers in the leg muscles of a marathon runner?

• A. Mitochondria
• B. Ribosomes
• C. Lysosomes
• D. Golgi apparatus

Answer: (A)

Verified step by step guidance

1. Begin by understanding the function of each organelle listed: Mitochondria, Ribosomes, Lysosomes, and Golgi apparatus.
2. Consider the role of mitochondria: They are known as the powerhouse of the cell, responsible for producing ATP through cellular respiration, which is crucial for energy-demanding activities like running.
3. Evaluate the function of ribosomes: They are involved in protein synthesis, which is essential for muscle repair and growth, but not directly related to energy production.
4. Analyze the role of lysosomes: These organelles are involved in waste processing and recycling within the cell, not directly related to energy production or muscle function.
5. Consider the function of the Golgi apparatus: It is involved in modifying, sorting, and packaging proteins, which is important for cellular function but not directly related to energy production in muscle cells.