Subjects
Careers
Maths
Chemistry
Biology
English Lang.
History
Energy transfers (a2 only)
Infection and response
Homeostasis and response
Responding to change (a2 only)
Cell biology
Organisms respond to changes in their internal and external environments (a-level only)
Biological molecules
Organisation
Substance exchange
Bioenergetics
Genetic information & variation
Inheritance, variation and evolution
Genetics & ecosystems (a2 only)
Ecology
Cells
Show all topics
Medieval period: 1066 -1509
2m wars and welfare: britain in transition, 1906-1957
World war two & the holocaust
1l the quest for political stability: germany, 1871-1991
1f industrialisation and the people: britain, c1783-1885
Britain & the wider world: 1745 -1901
2d religious conflict and the church in england, c1529-c1570
The cold war
1c the tudors: england, 1485-1603
Inter-war germany
2j america: a nation divided, c1845-1877
2n revolution and dictatorship: russia, 1917-1953
2s the making of modern britain, 1951-2007
World war one
Britain: 1509 -1745
Show all topics
42
0
elle
14/01/2023
Biology
Biology RP - Food Tests
GCSE AQA Combined Science Biology food tests are essential practical experiments that students need to master. This guide covers four key food tests: Benedict's solution for reducing sugars, iodine solution for starch, biuret reagent for proteins, and ethanol for lipids. Each test involves specific procedures and color changes to identify the presence of different nutrients in food samples.
14/01/2023
1310
This page continues with the iodine solution test results and introduces two more essential food tests for GCSE Biology: the biuret reagent test for proteins and the ethanol test for lipids.
Results interpretation:
Definition: Starch - A complex carbohydrate composed of many glucose molecules, commonly found in foods like potatoes, rice, and bread.
The biuret reagent test is used to detect the presence of proteins in a food sample.
Procedure:
Results interpretation:
Vocabulary: Biuret reagent - A chemical solution used to detect the presence of peptide bonds, which are characteristic of proteins.
The ethanol test is used to detect the presence of lipids in a food sample.
Procedure:
Results interpretation:
Highlight: The formation of a cloudy white layer in the ethanol test is a clear indicator of the presence of lipids in the food sample.
Quote: "If lipid is present, an emulsion forms as a cloudy white layer."
These food tests for GCSE Biology AQA are crucial practical skills that students need to master for their exams and future scientific endeavors. Understanding the procedures and being able to interpret the results accurately is essential for success in GCSE Biology food tests exam questions.
151
636
11
Biology required practical run through
run through of the main required practicals
8
318
10/11
The Digestive System: How It Works
Understanding the processes and organs involved in the digestion of food and absorption of nutrients in the human body.
2
167
11
Biology Mind Maps
AQA Biology Paper 1&2 mind maps
9
103
10/11
biology paper one notes
hope this helps
8
499
10/11
Biology practical- investigation of effect of pH on rate of reaction of amylase
Included method, variables, results
41
1963
10/11
Biology Paper 1 Practicals
Method of all practicals required on AQA biology paper 1 and AQA combined science including microscopy, zone of inhibition, cultivating microbes, Enzymes, Food tests, Osmosis and Photosynthesis
Average app rating
Pupils love Knowunity
In education app charts in 17 countries
Students have uploaded notes
iOS User
Philip, iOS User
Lena, iOS user
elle
@academia_angel
GCSE AQA Combined Science Biology food tests are essential practical experiments that students need to master. This guide covers four key food tests: Benedict's solution for reducing sugars, iodine solution for starch, biuret reagent for proteins, and ethanol for lipids.... Show more
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page continues with the iodine solution test results and introduces two more essential food tests for GCSE Biology: the biuret reagent test for proteins and the ethanol test for lipids.
Results interpretation:
Definition: Starch - A complex carbohydrate composed of many glucose molecules, commonly found in foods like potatoes, rice, and bread.
The biuret reagent test is used to detect the presence of proteins in a food sample.
Procedure:
Results interpretation:
Vocabulary: Biuret reagent - A chemical solution used to detect the presence of peptide bonds, which are characteristic of proteins.
The ethanol test is used to detect the presence of lipids in a food sample.
Procedure:
Results interpretation:
Highlight: The formation of a cloudy white layer in the ethanol test is a clear indicator of the presence of lipids in the food sample.
Quote: "If lipid is present, an emulsion forms as a cloudy white layer."
These food tests for GCSE Biology AQA are crucial practical skills that students need to master for their exams and future scientific endeavors. Understanding the procedures and being able to interpret the results accurately is essential for success in GCSE Biology food tests exam questions.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page outlines the general process for preparing food samples and details the procedures for two important food tests in GCSE Biology: the Benedict's solution test and the iodine solution test.
Before conducting any food tests, it's crucial to properly prepare the food sample:
The Benedict's solution test is used to detect the presence of reducing sugars in a food sample.
Procedure:
Highlight: The color change in this test is crucial for identifying the presence of reducing sugars.
Results interpretation:
Vocabulary: Benedict's solution - A chemical reagent used to detect the presence of reducing sugars in a sample.
The iodine solution test is used to detect the presence of starch in a food sample.
Procedure:
Example: When testing a slice of bread for starch, you would expect the iodine solution to turn blue-black, indicating the presence of starch.
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.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
App Store
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
