Cell biology is the foundation of understanding how all living...
Biology357 views·Updated 29 Jun 2026·2 pagesAQA Biology Year 10 - Key Cell Definitions Study Guide
L
Liam@liam_iznt
1
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Essential Cell Biology Terms (Part 1)
Ever wondered how your cells know exactly what to become? Cell differentiation is the amazing process where a basic cell transforms into something specialised, like a nerve cell or muscle cell. It's like cells choosing their career path!
Active transport is your cells' way of working against the odds - moving substances from areas where there's less of something to where there's more, using energy from respiration. Think of it like pushing water uphill. This happens in your mitochondria, the cell's powerhouses where respiration takes place.
Diffusion works the opposite way, as particles naturally spread from crowded areas to less crowded ones down a concentration gradient. Meanwhile, osmosis is specifically water moving through partially permeable membranes - something your cell membrane does brilliantly to control what enters and exits your cells.
Plant cells get extra protection from their cellulose cell wall and use chloroplasts for photosynthesis. Your genetic information sits safely in chromosomes within the nucleus, whilst scientists use agar jelly in petri dishes to study microorganisms and understand these processes better.
Quick Tip: Remember that active transport needs energy, but diffusion and osmosis happen naturally!
2
of 2
Essential Cell Biology Terms (Part 2)
Understanding different cell types is crucial for your exams. Eukaryotic cells (like yours) have a proper nucleus containing genetic material, whilst prokaryotic cells (bacteria) keep their DNA floating freely in loops called plasmids. Each organelle inside cells has a specific job, just like organs in your body.
Mitosis is how your body creates two identical daughter cells from one parent cell during the cell cycle - essential for growth and repair. Stem cells are the ultimate multitaskers, staying undifferentiated until they're needed. Adult stem cells can become many cell types, embryonic stem cells can become almost anything, and meristematic cells help plants grow.
Specialised cells are perfectly adapted for their jobs, but their efficiency often depends on surface area to volume ratio. Smaller cells typically work better because they have more contact with their environment relative to their size.
When using microscopes, remember that magnification shows how much bigger something appears, whilst resolution determines how clearly you can see two separate points. Therapeutic cloning represents cutting-edge science, creating embryos with identical genes to patients for potential treatments.
Exam Focus: Surface area to volume ratio calculations often appear in exam questions - practise these!
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Biology357 views·Updated 29 Jun 2026·2 pagesAQA Biology Year 10 - Key Cell Definitions Study Guide
L
Liam@liam_iznt
Cell biology is the foundation of understanding how all living things work, from the tiniest bacteria to complex organisms like humans. These key terms will help you master everything from cell structure to how cells move substances around and reproduce.
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Essential Cell Biology Terms (Part 1)
Ever wondered how your cells know exactly what to become? Cell differentiation is the amazing process where a basic cell transforms into something specialised, like a nerve cell or muscle cell. It's like cells choosing their career path!
Active transport is your cells' way of working against the odds - moving substances from areas where there's less of something to where there's more, using energy from respiration. Think of it like pushing water uphill. This happens in your mitochondria, the cell's powerhouses where respiration takes place.
Diffusion works the opposite way, as particles naturally spread from crowded areas to less crowded ones down a concentration gradient. Meanwhile, osmosis is specifically water moving through partially permeable membranes - something your cell membrane does brilliantly to control what enters and exits your cells.
Plant cells get extra protection from their cellulose cell wall and use chloroplasts for photosynthesis. Your genetic information sits safely in chromosomes within the nucleus, whilst scientists use agar jelly in petri dishes to study microorganisms and understand these processes better.
Quick Tip: Remember that active transport needs energy, but diffusion and osmosis happen naturally!
2
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Essential Cell Biology Terms (Part 2)
Understanding different cell types is crucial for your exams. Eukaryotic cells (like yours) have a proper nucleus containing genetic material, whilst prokaryotic cells (bacteria) keep their DNA floating freely in loops called plasmids. Each organelle inside cells has a specific job, just like organs in your body.
Mitosis is how your body creates two identical daughter cells from one parent cell during the cell cycle - essential for growth and repair. Stem cells are the ultimate multitaskers, staying undifferentiated until they're needed. Adult stem cells can become many cell types, embryonic stem cells can become almost anything, and meristematic cells help plants grow.
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