Your complete guide to smashing AQA GCSE Biology! This revision... Show more
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Comprehensive Revision Checklist for GCSE Combined Science
P
Prabh
@prabhleenkaur_girr
1 / 7
Cell Biology & Organisation
Cell biology is where your GCSE journey begins - understanding how life works at the smallest level. You'll master cell structure, learn how cells become specialised through differentiation, and discover how microscopy lets us see the invisible world.
Cell division and stem cells show how organisms grow and repair themselves. Meanwhile, transport processes like diffusion, osmosis, and active transport explain how substances move in and out of cells - crucial for understanding how organisms survive.
The organisation section connects cells to tissues, organs, and systems. You'll explore enzymes (the body's chemical catalysts), the digestive system, circulatory system, and how diseases like cancer and cardiovascular disease affect our bodies.
Quick Tip: Think of cells as tiny factories - each part has a specific job, just like workers in a real factory!
Infection, Response & Bioenergetics
Pathogens are everywhere, but your body's got brilliant defences! You'll learn about human defence systems, how vaccinations work, and why drug development takes so long. Monoclonal antibodies (Higher tier only) show cutting-edge medical treatments.
Bioenergetics covers the two most important processes in biology: photosynthesis and respiration. Plants use photosynthesis to make food from sunlight, whilst all living things use respiration to release energy from that food.
Understanding the rate of photosynthesis helps explain why plants need light, carbon dioxide, and the right temperature. Metabolism ties everything together - it's all the chemical reactions keeping you alive!
Exam Focus: Learn the photosynthesis and respiration equations by heart - they're guaranteed to appear on your paper!
Homeostasis & Response
Homeostasis is your body's amazing ability to keep everything balanced, even when your environment changes dramatically. Your nervous system and brain work together to detect changes and respond lightning-fast.
Your endocrine system uses hormones for longer-term control. Blood glucose control keeps your energy levels steady, whilst thermoregulation maintains your body temperature. Your kidneys handle water and nitrogen balance to keep your blood chemistry just right.
Human reproduction involves complex hormone cycles, and feedback systems (Higher tier) explain how your body fine-tunes these processes. Even plants have hormones that control their growth and responses!
Memory Trick: Think of homeostasis like a thermostat - it constantly monitors and adjusts to keep things perfect!
Inheritance, Variation & Evolution
DNA contains the instructions for life, stored in genes that get passed from parents to offspring through reproduction. Meiosis creates sex cells with half the normal chromosome number, ensuring genetic variety.
Genetic inheritance follows predictable patterns you can work out using genetic diagrams. Some inherited disorders are caused by faulty genes, whilst variation comes from both genes and environment.
Evolution explains how species change over millions of years, with fossil and DNA evidence supporting Darwin's theory. Humans now influence evolution through selective breeding, genetic engineering, and cloning.
Exam Success: Practice drawing genetic inheritance diagrams - they're straightforward marks once you've got the technique down!
Ecology & Scientific Methods
Ecosystems are complex webs of interactions between living organisms and their environment. You'll investigate how to study ecosystems, understand food chains and trophic levels, and explore nutrient cycles that keep ecosystems functioning.
Human activity massively impacts biodiversity, but we're also developing solutions through sustainable food production and biotechnology. Decomposition by bacteria and fungi recycles nutrients essential for life.
The scientific methods section gives you the practical skills for success. Master significant figures, standard form, and unit conversions. Learn to design experiments, analyse graphs and data, and understand errors and uncertainty.
Practical Tip: Always show your working in calculations - even if your final answer's wrong, you can still earn method marks!
Advanced Scientific Skills
Statistics calculations help you analyse data properly and draw valid conclusions from your results. Understanding experimental design ensures your investigations are fair tests that actually prove what you think they prove.
Peer review and ethics show how real scientists work, whilst sampling techniques help you collect representative data from populations. Learning to work safely in labs protects you and others during practical work.
The scientific method underlies everything in science - forming hypotheses, testing them fairly, and drawing evidence-based conclusions. These skills aren't just for exams; they'll help you think critically about scientific claims throughout your life.
Real World: These scientific skills help you evaluate everything from health claims on social media to environmental news stories!
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Where can I download the Knowunity app?
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Most popular content in Biology
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Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.9/5
App Store
4.8/5
Google 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 S
iOS 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 Klich
Android 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.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
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 S
iOS 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 Klich
Android 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.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Comprehensive Revision Checklist for GCSE Combined Science
P
Prabh
@prabhleenkaur_girr
Your complete guide to smashing AQA GCSE Biology! This revision checklist covers everything from tiny cells to massive ecosystems, plus all the scientific skills you'll need to ace your exams.
Cell Biology & Organisation
Cell biology is where your GCSE journey begins - understanding how life works at the smallest level. You'll master cell structure, learn how cells become specialised through differentiation, and discover how microscopy lets us see the invisible world.
Cell division and stem cells show how organisms grow and repair themselves. Meanwhile, transport processes like diffusion, osmosis, and active transport explain how substances move in and out of cells - crucial for understanding how organisms survive.
The organisation section connects cells to tissues, organs, and systems. You'll explore enzymes (the body's chemical catalysts), the digestive system, circulatory system, and how diseases like cancer and cardiovascular disease affect our bodies.
Quick Tip: Think of cells as tiny factories - each part has a specific job, just like workers in a real factory!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Infection, Response & Bioenergetics
Pathogens are everywhere, but your body's got brilliant defences! You'll learn about human defence systems, how vaccinations work, and why drug development takes so long. Monoclonal antibodies (Higher tier only) show cutting-edge medical treatments.
Bioenergetics covers the two most important processes in biology: photosynthesis and respiration. Plants use photosynthesis to make food from sunlight, whilst all living things use respiration to release energy from that food.
Understanding the rate of photosynthesis helps explain why plants need light, carbon dioxide, and the right temperature. Metabolism ties everything together - it's all the chemical reactions keeping you alive!
Exam Focus: Learn the photosynthesis and respiration equations by heart - they're guaranteed to appear on your paper!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Homeostasis & Response
Homeostasis is your body's amazing ability to keep everything balanced, even when your environment changes dramatically. Your nervous system and brain work together to detect changes and respond lightning-fast.
Your endocrine system uses hormones for longer-term control. Blood glucose control keeps your energy levels steady, whilst thermoregulation maintains your body temperature. Your kidneys handle water and nitrogen balance to keep your blood chemistry just right.
Human reproduction involves complex hormone cycles, and feedback systems (Higher tier) explain how your body fine-tunes these processes. Even plants have hormones that control their growth and responses!
Memory Trick: Think of homeostasis like a thermostat - it constantly monitors and adjusts to keep things perfect!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Inheritance, Variation & Evolution
DNA contains the instructions for life, stored in genes that get passed from parents to offspring through reproduction. Meiosis creates sex cells with half the normal chromosome number, ensuring genetic variety.
Genetic inheritance follows predictable patterns you can work out using genetic diagrams. Some inherited disorders are caused by faulty genes, whilst variation comes from both genes and environment.
Evolution explains how species change over millions of years, with fossil and DNA evidence supporting Darwin's theory. Humans now influence evolution through selective breeding, genetic engineering, and cloning.
Exam Success: Practice drawing genetic inheritance diagrams - they're straightforward marks once you've got the technique down!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Ecology & Scientific Methods
Ecosystems are complex webs of interactions between living organisms and their environment. You'll investigate how to study ecosystems, understand food chains and trophic levels, and explore nutrient cycles that keep ecosystems functioning.
Human activity massively impacts biodiversity, but we're also developing solutions through sustainable food production and biotechnology. Decomposition by bacteria and fungi recycles nutrients essential for life.
The scientific methods section gives you the practical skills for success. Master significant figures, standard form, and unit conversions. Learn to design experiments, analyse graphs and data, and understand errors and uncertainty.
Practical Tip: Always show your working in calculations - even if your final answer's wrong, you can still earn method marks!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Advanced Scientific Skills
Statistics calculations help you analyse data properly and draw valid conclusions from your results. Understanding experimental design ensures your investigations are fair tests that actually prove what you think they prove.
Peer review and ethics show how real scientists work, whilst sampling techniques help you collect representative data from populations. Learning to work safely in labs protects you and others during practical work.
The scientific method underlies everything in science - forming hypotheses, testing them fairly, and drawing evidence-based conclusions. These skills aren't just for exams; they'll help you think critically about scientific claims throughout your life.
Real World: These scientific skills help you evaluate everything from health claims on social media to environmental news stories!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
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.
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Most popular content in Biology
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Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.9/5
App Store
4.8/5
Google 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 S
iOS 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 Klich
Android 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.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
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 S
iOS 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 Klich
Android 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.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user