1. Which organelle in eukaryotic cells is responsible for producing energy in the form of ATP? A. Nucleus B. Golgi apparatus C. Mitochondria D. Endoplasmic reticulum Answer: C. Mitochondria Rationale: The mitochondria contain enzymes necessary for aerobic respiration, which produces ATP, the energy currency of the cell. 2. Which organelle is responsible for protein synthesis in eukaryotic cells? A. Nucleus B. Ribosome C. Golgi apparatus D. Endoplasmic reticulum Answer: B. Ribosome Rationale: Ribosomes are the site of protein synthesis in the cell, where they translate mRNA into proteins. 3. Which organelle in eukaryotic cells is responsible for detoxification and lipid metabolism? A. Nucleus B. Lysosome C. Golgi apparatus D. Smooth endoplasmic reticulum Answer: D. Smooth endoplasmic reticulum Rationale: The smooth endoplasmic reticulum is responsible for detoxification and lipid metabolism, while the rough endoplasmic reticulum is involved in protein synthesis. 4. Which organelle in eukaryotic cells is responsible for packaging and transporting proteins to other parts of the cell? A. Nucleus B. Lysosome C. Golgi apparatus D. Endoplasmic reticulum Answer: C. Golgi apparatus Rationale: The Golgi apparatus processes, sorts, and packages proteins for