IGCSE Biology Cells for the 2024 - 2025 Exams

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1. *Multicellular Organisms* 🌱:
- Humans and many other organisms are made up of trillions of cells, making them multicellular.
2. *Unicellular Organisms* 🦠:
- Some organisms consist of just one cell, which is capable of performing all seven characteristics of life.
3. *Cell Membrane* 🛡️:
- Acts as a filter, allowing only specific particles to enter the cell.
- Known as being partially permeable.
4. *Nucleus* 🧬:
- The control center of the cell.
- Contains DNA organized in the form of chromosomes.
5. *Mitochondria* 🔋:
- Responsible for aerobic respiration, providing energy for the cell.
6. *Ribosomes* 🏗️:
- The site where proteins are made.
- Proteins like hair are synthesized on these organelles.
7. *Vesicles* 📦:
- Round organelles that transport proteins within the cell.
8. *Rough Endoplasmic Reticulum (RER)* 🏭:
- Cells specialized in exporting proteins have a large RER.
- Contains numerous ribosomes for protein production.
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