Which organelle is not found in an animal cell?

• A. Nucleus
• B. Chloroplast
• C. Endoplasmic Reticulum
• D. Mitochondrion

Answer: (B)

Verified step by step guidance

1. Begin by identifying the organelles listed in the problem: Nucleus, Chloroplast, Endoplasmic Reticulum, and Mitochondrion.
2. Understand the function and presence of each organelle in animal cells. The nucleus is the control center of the cell, containing genetic material, and is present in both animal and plant cells.
3. The endoplasmic reticulum is involved in protein and lipid synthesis and is also found in both animal and plant cells.
4. The mitochondrion is known as the powerhouse of the cell, responsible for energy production, and is present in both animal and plant cells.
5. Chloroplasts are organelles responsible for photosynthesis and are typically found in plant cells, not animal cells. Therefore, chloroplasts are the organelle not found in animal cells.