Which organelle is found only in plant cells?

• A. Ribosome
• B. Nucleus
• C. Mitochondrion
• D. Chloroplast

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the question by identifying the organelle that is unique to plant cells. This requires knowledge of cell biology and the differences between plant and animal cells.
2. Step 2: Review the function of each organelle listed in the options: Ribosome (involved in protein synthesis, found in both plant and animal cells), Nucleus (contains genetic material, found in both plant and animal cells), Mitochondrion (responsible for energy production, found in both plant and animal cells), and Chloroplast (involved in photosynthesis, unique to plant cells).
3. Step 3: Recall that chloroplasts are specialized organelles found only in plant cells and some protists. They contain chlorophyll, which captures light energy for photosynthesis, a process unique to plants.
4. Step 4: Eliminate the incorrect options (Ribosome, Nucleus, and Mitochondrion) based on their presence in both plant and animal cells.
5. Step 5: Conclude that the correct answer is Chloroplast, as it is the organelle found only in plant cells and is essential for photosynthesis.