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Learn: Cell Biology - Introduction to Cell Structure
AQA GCSE Biology 8461 specification
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Welcome!Today we'll explore cell structure, a key part of understanding life at the microscopic level. Let's dive into how cells work and why they're important.
What are Cells?Cells are the basic building blocks of all living organisms. They provide structure, carry out essential functions, and contain genetic material.
Types of CellsThere are two main types of cells: prokaryotic (simple cells like bacteria) and eukaryotic (complex cells found in plants, animals, and fungi). Eukaryotic cells have a nucleus, while prokaryotic cells do not.
Quick check: Which type of cell contains a nucleus?
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Cell StructureCells contain various components called organelles, each with a specific function. Key organelles include the nucleus, mitochondria, ribosomes, and the cell membrane.
Match the items on the left with their correct pairs on the right
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MicroscopyMicroscopes are used to study cells because they are too small to see with the naked eye. Light microscopes provide lower magnification, while electron microscopes reveal much more detail.
Electron microscopes have a much higher {{blank0}} than light microscopes, allowing us to see {{blank1}} details.
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Cell DivisionCells divide through a process called mitosis to create identical copies. This is important for growth, repair, and replacement of cells.
Which of the following are true about mitosis? (Select all that apply)
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Transport in CellsCells exchange substances with their environment through diffusion, osmosis, and active transport. These processes move molecules in and out of cells.
Quick check: Which process requires energy?
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Review Time!Great work! You've learned about cell structure, types, division, microscopy, and transport. Let's test your understanding with a few questions.
Which of the following are organelles found in eukaryotic cells? (Select all that apply)
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Mitosis creates {{blank0}} cells, which are {{blank1}} to the original cell.
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Which organelle is responsible for producing energy in the cell?
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