Which primary function is most directly associated with mitochondria in eukaryotic cells?

• A. Modifying and sorting proteins for secretion via the Golgi apparatus
• B. Synthesizing proteins by translating mRNA on ribosomes
• C. Storing genetic information as chromosomal DNA in the nucleus
• D. Generating ATP through aerobic respiration (oxidative phosphorylation)

Answer: (D)

Verified step by step guidance

1. Identify the main organelles mentioned and their primary functions: mitochondria, Golgi apparatus, ribosomes, and nucleus.
2. Recall that mitochondria are known as the 'powerhouses' of the cell because they generate energy in the form of ATP.
3. Understand that ATP production in mitochondria occurs through aerobic respiration, specifically oxidative phosphorylation, which uses oxygen to efficiently produce ATP.
4. Contrast this with the other options: the Golgi apparatus modifies and sorts proteins, ribosomes synthesize proteins by translating mRNA, and the nucleus stores genetic information as DNA.
5. Conclude that the primary function most directly associated with mitochondria is generating ATP through aerobic respiration (oxidative phosphorylation).