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cell structure organelles
A LevelBiology~4 min read
Overview
This lesson explores the fundamental building blocks of life, cells, by delving into their intricate internal structures known as organelles. We will differentiate between prokaryotic and eukaryotic cells, focusing on the specialised functions of each organelle within eukaryotic cells.
Introduction to Cells: Prokaryotes vs. Eukaryotes
Cells are the basic structural and functional units of all known organisms. They are broadly categorised into two main types: prokaryotic and eukaryotic cells. **Prokaryotic cells** are simpler and smaller, lacking a true nucleus and other membrane-bound organelles. Their genetic material (DNA) is l...
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Key Concepts
- Prokaryotic Cell: Simple cell lacking a membrane-bound nucleus and other membrane-bound organelles.
- Eukaryotic Cell: Complex cell possessing a membrane-bound nucleus and various membrane-bound organelles.
- Organelle: Specialised subunit within a cell that has a specific function.
- Nucleus: Contains the cell's genetic material (DNA) and controls cell activities.
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Exam Tips
- →Be able to clearly differentiate between prokaryotic and eukaryotic cells, listing key structural differences.
- →For each major organelle, know its structure (e.g., single/double membrane, presence of ribosomes) and its primary function. Use labelled diagrams to aid recall.
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