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Learn: Cell Biology - Cell Structure and Function
AQA GCSE Biology 8461 specification
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Welcome!Today we'll explore cell biology, focusing on cell structure and function. Cells are the building blocks of all living organisms, and understanding them helps us learn how life works.
What is a Cell?A cell is the smallest unit of life, capable of performing all life processes. Cells can be either prokaryotic (like bacteria) or eukaryotic (like plant and animal cells).
Cell OrganellesOrganelles are structures within a cell that have specific functions. For example, the nucleus controls the cell's activities, and the mitochondria provide energy. Plant cells also have chloroplasts for photosynthesis.
Quick check: Which organelle is responsible for energy production?
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MicroscopyMicroscopes allow us to see cells and their organelles. There are two main types: light microscopes for basic observation and electron microscopes for detailed images.
Electron microscopes provide {{blank0}} resolution than light microscopes, allowing us to see {{blank1}} details of cell organelles.
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Cell DivisionCells divide through mitosis, which produces two identical daughter cells. This process is essential for growth and repair in organisms.
Match the items on the left with their correct pairs on the right
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Transport MechanismsCells exchange substances with their environment through diffusion (movement from high to low concentration), osmosis (water movement), and active transport (requires energy to move substances).
Which of the following are examples of transport mechanisms? (Select all that apply)
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Review Time!Great work! You've learned about cell structure, microscopy, cell division, and transport mechanisms. Let's test your understanding with a few final questions.
Which part of the cell controls its activities?
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The {{blank0}} is the powerhouse of the cell, generating energy through respiration.
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Match the items on the left with their correct pairs on the right
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Which organelles are found in plant cells but not animal cells? (Select all that apply)
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