Grade 11 · Biology
Organelles in detail
Why it matters
The structure and function of every major organelle.
Core20m readingPrerequisite: Cell theory & cell types
What are the main cell organelles and their functions?
Short answer
Organelles are specialized structures inside a cell. The nucleus stores DNA and directs activities; mitochondria release energy through respiration; ribosomes build proteins; the endoplasmic reticulum and Golgi apparatus process and package them; lysosomes digest waste. Plant cells also have chloroplasts for photosynthesis, a cell wall, and a large central vacuole.
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Frequently asked questions
- What is the function of mitochondria?
- They carry out cellular respiration, releasing energy as ATP — often called the powerhouse of the cell.
- Which organelles are unique to plant cells?
- Chloroplasts, a cellulose cell wall, and a large central vacuole are found in plant but not animal cells.