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Learn: Cell Biology - Cell Structure and Function
AQA GCSE Biology 8461 specification
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Welcome!Today we'll learn about Cell Biology, specifically cell structure and function. We'll explore how cells work and why they are essential for life.
What are cells?Cells are the basic building blocks of all living organisms. They carry out essential processes that allow life to exist. Organisms can be made of one cell (unicellular) or many cells (multicellular).
Parts of a cellCells have different structures called organelles. Each organelle has a specific function that helps the cell survive and work properly.
Quick check: Which organelle controls the activities of the cell?
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Cell typesThere are two main types of cells: prokaryotic (e.g., bacteria) and eukaryotic (e.g., animal and plant cells). Prokaryotic cells are simpler and smaller, while eukaryotic cells are more complex and larger.
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MicroscopyMicroscopes allow us to see cells and their structures. There are two main types: light microscopes (used in schools for basic viewing) and electron microscopes (used for detailed images).
An electron microscope provides higher {{blank0}} than a light microscope.
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Cell Transport ProcessesCells move substances in and out using processes like diffusion, osmosis, and active transport. These are essential for maintaining life.
Which process moves substances from high to low concentration without energy?
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Cell DivisionCells divide to grow and repair tissues. They undergo a process called mitosis to produce genetically identical cells.
Which of the following are true about mitosis? (Select all that apply)
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Review Time!Great work! You've learned about cell structure, microscopy, transport, and division. Now let's review all key concepts.
What is the role of mitochondria in a cell?
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The nucleus contains {{blank0}} material.
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Match the items on the left with their correct pairs on the right
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Which apply to prokaryotic cells? (Select all that apply)
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