Which of the following organelles or cellular structures is unique to plant cells (i.e., not found in animal cells)?

• A. Chloroplasts
• B. Mitochondria
• C. Rough endoplasmic reticulum
• D. Golgi apparatus

Answer: (A)

Verified step by step guidance

1. Understand the question is asking to identify an organelle or cellular structure that is unique to plant cells and not found in animal cells.
2. Recall the functions and presence of each listed organelle: Mitochondria (energy production, found in both plant and animal cells), Rough endoplasmic reticulum (protein synthesis, found in both), Golgi apparatus (modifies and packages proteins, found in both).
3. Recognize that chloroplasts are the site of photosynthesis and are only present in plant cells and some protists, but not in animal cells.
4. Conclude that chloroplasts are unique to plant cells among the options given.
5. Summarize that the key to solving this problem is knowing which organelles are common to both cell types and which are exclusive to plants.