Which of the following is NOT found in animal cell?

Analyze the question: You are asked to pick the organelle that is absent from animal cells.

Explain the concept: Animal cells are eukaryotic, so they have membrane-bound organelles. They do not have structures that belong specifically to plant cells, namely:

• Cell wall (cellulose)
• Chloroplasts (for photosynthesis)
• Large permanent central vacuole

Step-by-step check of each option:

• A. Chloroplast: Contains chlorophyll and carries out photosynthesis. Animals feed on ready-made food (they are heterotrophs), so their cells have no chloroplasts. Not found in animal cells.
• B. Endoplasmic reticulum: Present. It transports materials, and the rough type carries ribosomes for protein synthesis.
• C. Golgi apparatus: Present. It packages and secretes substances.
• D. Mitochondria: Present. They are the site of aerobic respiration and release energy (ATP).
• E. Nucleus: Present. It controls cell activities and holds the genetic material.

Answer: The organelle not found in animal cells is the chloroplast, which is option A.

Exam tip: Remember the three plant-only features as "Chloroplast, Cell wall, Central vacuole" (the 3 Cs). If a question asks what is NOT in an animal cell, look for one of these first.