Every living thing is made up of tiny building blocks... Show more
Biology793 views·Updated Jun 1, 2026·3 pagesGCSE Biology Cells - Covering AQA Combined Science
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Understanding Cell Types
You'll encounter two major types of cells in biology: prokaryotic cells and eukaryotic cells. The key difference is simple - prokaryotic cells (found in bacteria) don't have a nucleus, whilst eukaryotic cells (found in plants and animals) do have one.
Think of the nucleus as the cell's control centre. Animal cells are eukaryotic and contain five main features: cytoplasm, nucleus, cell membrane, mitochondria, and ribosomes.
Plant cells are also eukaryotic but have three extra features that animal cells don't: a cell wall, permanent vacuole, and chloroplasts. These extra parts help plants do things animals can't, like make their own food!
Quick Tip: Remember that plant cells have everything animal cells have, plus three extra features - they're like animal cells with bonus equipment!
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Cell Parts and Their Jobs
Each part of a cell has a specific job, like workers in a factory. The cytoplasm is a jelly-like material where most chemical reactions happen - think of it as the cell's workspace.
The nucleus contains genetic material and controls everything the cell does. The cell membrane acts like a security guard, deciding what can enter or leave the cell.
Mitochondria are the cell's power stations, releasing energy through respiration. Ribosomes are tiny protein-making machines. In plants, chloroplasts contain chlorophyll for photosynthesis, and the cell wall provides extra strength and shape.
Memory Trick: Think of mitochondria as tiny batteries - they power everything the cell does!
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Prokaryotic Cells - The Simple Ones
Bacterial cells are much simpler than plant and animal cells because they're prokaryotic. Instead of having a proper nucleus, they have free-floating DNA that looks like a single strand or small rings called plasmids.
These cells don't have chloroplasts or mitochondria either. They manage with just the basics: cytoplasm, cell membrane, cell wall, and sometimes a flagellum .
Even though prokaryotic cells seem simple, they're incredibly successful - bacteria are found everywhere on Earth! They prove that you don't always need complicated parts to survive and thrive.
Fun Fact: Bacteria have been around for billions of years longer than plants and animals - sometimes simple really is better!
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Biology793 views·Updated Jun 1, 2026·3 pagesGCSE Biology Cells - Covering AQA Combined Science
essie@academia_angel
Every living thing is made up of tiny building blocks called cells, but not all cells are the same! There are two main types of cells that work in completely different ways, and understanding them will help you make sense... Show more
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Understanding Cell Types
You'll encounter two major types of cells in biology: prokaryotic cells and eukaryotic cells. The key difference is simple - prokaryotic cells (found in bacteria) don't have a nucleus, whilst eukaryotic cells (found in plants and animals) do have one.
Think of the nucleus as the cell's control centre. Animal cells are eukaryotic and contain five main features: cytoplasm, nucleus, cell membrane, mitochondria, and ribosomes.
Plant cells are also eukaryotic but have three extra features that animal cells don't: a cell wall, permanent vacuole, and chloroplasts. These extra parts help plants do things animals can't, like make their own food!
Quick Tip: Remember that plant cells have everything animal cells have, plus three extra features - they're like animal cells with bonus equipment!
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- Access to all documents
- Improve your grades
- Join milions of students
Cell Parts and Their Jobs
Each part of a cell has a specific job, like workers in a factory. The cytoplasm is a jelly-like material where most chemical reactions happen - think of it as the cell's workspace.
The nucleus contains genetic material and controls everything the cell does. The cell membrane acts like a security guard, deciding what can enter or leave the cell.
Mitochondria are the cell's power stations, releasing energy through respiration. Ribosomes are tiny protein-making machines. In plants, chloroplasts contain chlorophyll for photosynthesis, and the cell wall provides extra strength and shape.
Memory Trick: Think of mitochondria as tiny batteries - they power everything the cell does!
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of 3Sign up to see the content. It's free!
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Prokaryotic Cells - The Simple Ones
Bacterial cells are much simpler than plant and animal cells because they're prokaryotic. Instead of having a proper nucleus, they have free-floating DNA that looks like a single strand or small rings called plasmids.
These cells don't have chloroplasts or mitochondria either. They manage with just the basics: cytoplasm, cell membrane, cell wall, and sometimes a flagellum .
Even though prokaryotic cells seem simple, they're incredibly successful - bacteria are found everywhere on Earth! They prove that you don't always need complicated parts to survive and thrive.
Fun Fact: Bacteria have been around for billions of years longer than plants and animals - sometimes simple really is better!
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Similar content
Most popular content: Prokaryotic Cells
9Most popular content in Biology
9Most popular content
9Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5App Store
4.7/5Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan SiOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha KlichAndroid user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
AnnaiOS user