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Learn: Cells as the Basic Unit of Life
OCR GCSE Combined Science J250
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Welcome!Today we'll be learning about cells as the basic unit of life. This is an exciting topic that helps us understand the foundation of all living things.
What Are Cells?Cells are the basic structural and functional units of all living organisms. They are responsible for carrying out processes that keep organisms alive, like energy production and reproduction.
Types of CellsThere are two main types of cells: prokaryotic and eukaryotic. Prokaryotic cells are simpler and smaller, like bacteria, while eukaryotic cells are larger and more complex, found in plants and animals.
Which of the following is a characteristic of prokaryotic cells?
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Cell StructureCells have different parts called organelles, each with a specific function. For example, the nucleus controls the cell's activities, and the mitochondria provide energy.
The {{blank0}} controls the cell’s activities, while the {{blank1}} produces energy.
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How Microscopy Helps Us Understand CellsMicroscopes allow us to see cells in detail. Light microscopes use visible light, while electron microscopes can magnify cells to an even greater level and show organelles like ribosomes.
Match the items on the left with their correct pairs on the right
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Cell MembraneThe cell membrane controls the movement of substances in and out of the cell. It is selectively permeable, meaning it only lets certain molecules pass through.
Which of the following are functions of the cell membrane? (Select all that apply)
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Review Time!Great work! You've learned about the structure, types, and function of cells as the basic unit of life. Now, let's test your understanding with a few more questions.
Which organelle is known as the powerhouse of the cell?
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Which of the following are true about eukaryotic cells? (Select all that apply)
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The {{blank0}} is selectively permeable and controls the movement of substances in and out of the cell.
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Match the items on the left with their correct pairs on the right
Start the lesson to answer this matching question
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