I left my book at school, thank you

@MissEstruchBiology

8 ай бұрын

You're welcome 😊

@robertasmith1116

Ай бұрын

A friend took mine and tomorrow is my CIE AS LEVEL EXAM😂

Keep doing what you’re doing. The clarity you produced is amazing

@MissEstruchBiology

3 жыл бұрын

Thank you so much 😊 Means a lot to know the videos are helping.

@dasuninavodika7320

Жыл бұрын

@@MissEstruchBiology swe

I was sick from school and I miss this lab experiment but your video help me to get caught back up and understand everything. Thank you so much and keep being you.

@MissEstruchBiology

2 жыл бұрын

Amazing 😃😃 So pleased it helped you to catch up.

@muktaryahye1189

8 ай бұрын

Me too❤😊

I am a private student and self studying looking for a complete career change, I have found your videos that have been an amazing complement to the AQA text book. I watch your videos before studying the topic and it just makes so much more sense. Being a private student, it is tough to get into a lab, so thank you for these brilliant videos. I understand how much time they must take to compile. Thank you!

@MissEstruchBiology

7 ай бұрын

You are so welcome! I'm so pleased they are helping you 😊😊

I love how you cover every spec point and put the mark scheme answers in bold. Thank you so so much!!

@MissEstruchBiology

3 жыл бұрын

Thank you! So glad you find it helpful the way it's presented. I try to keep it concise and linked to marking points to help with efficient revision.

Who is mean enough to dislike these? They are amazing and so helpful, Thankyou so much 🙏

@MissEstruchBiology

3 жыл бұрын

haha thank you 😊 So pleased you find them helpful. Good luck with your exams!

thank you so much for this video Miss Estruch!! the bit about why the colour change starts at the top is so cool :) and the practical video is so helpful since we can't do practicals at the moment :(

@MissEstruchBiology

3 жыл бұрын

Really glad you found it helpful as a replacement for actually doing the practical.

thanks miss Estruch, you are amazing. I was so confused, but when I watched your video, you clarified everything

@MissEstruchBiology

3 жыл бұрын

So pleased it helped you 😊😊

This channel is underrated You are legit the eliot rintoul of A level biology Great vid thank u!

@MissEstruchBiology

3 жыл бұрын

Thank you so much 😊😊 Hope the videos help your studies!!

Excellent video for quick revision... thanks!

Excellent - great to share with students who have either not done or have forgotten food tests!

@lc4979q

Жыл бұрын

i know you commented this ages ago, but do we need to add water to the sample along with benedicts?

thank you so much for this video Miss Estruch

@MissEstruchBiology

2 жыл бұрын

You are so welcome! I hope its helpful :)

should be illegal to explain things as good as you do aha, some serious talent for teaching there

@MissEstruchBiology

3 жыл бұрын

😆😆 aww thank you!!

Great video, thanks so much for all the tests in one and the final summary!!!

@MissEstruchBiology

3 ай бұрын

Thank you!

Hello Miss!!!!! Thank you so much for the video :)

@MissEstruchBiology

3 жыл бұрын

You are very welcome! Really pleased it have helped you.

Thank you so much, for some of us who are writing GCE.

@MissEstruchBiology

2 ай бұрын

You're welcome 😊

Thank you so much...i even learnt beyond my textbook

@MissEstruchBiology

3 жыл бұрын

So glad the video helped 😊

The video is mazing so i have downloaded it. Thank u very much.

Thanks a lot Miss. It helped a lot...

@MissEstruchBiology

Жыл бұрын

you're so welcome

Wow this is helpful thanks so much God bless you abundantly ❤❤

This woman is out here saving lives😭

Thank you for amazing video 🙏🏻❤

@MissEstruchBiology

3 ай бұрын

You are so welcome!

Words can’t describe how much I love this women

@MissEstruchBiology

9 ай бұрын

😂😂😂 glad the videos are helping

THANK you so much .

@MissEstruchBiology

10 ай бұрын

Hope it helps 😊

Hi from Pakistan, thanks for saving me. I have shared your this consolidated biochemical test video with my FSc ( high school's students) as I was guilty I couldn't deliver them enough in my practical class. Keep up good work . N I would like to suggest u a few more topics along with textbook material that needs 3D demonstration and practical demonstration. If u appreciate it, u may create a video on it. Stay blessed ❤

Hi Miss, do we have to know specific measurements of how much reagent we have to add. Like do we have to say “add 2cm3 of Benedict’s reagent to the test tube”

Hi, miss! What changes would you make to obtain semi-quantitative results, please?

I did experiment but I didn't understand coz our lab supervisor didn't explain it properly but thanks for the help from this video.

@MissEstruchBiology

Ай бұрын

Happy to help 😊

Lovely work, this will be helpful for my tests. Thanks! ~Mustafa Dafalla.

@MissEstruchBiology

2 жыл бұрын

You're so welcome!

This is extra work given by my teacher, and wooh 😅 this is hard im currently in year 8 and this helped tyssm !!❤❤

@MissEstruchBiology

4 күн бұрын

Yay,glad it helped 😁

Do we need to know why the colour change occurs at the top of the solution first for the exam ? is that on the spec ? Amazing videos ! I'm watching them all before my exams this year , I haven't been able to go to my lessons but have still got As thanks to you !!

@MissEstruchBiology

2 жыл бұрын

Hey not on the spec, but an example of an application question

Hi Miss Estruch, Firstly thank you for these videos, they're amazing!! I was just wondering if we need to know the names of the 'acid' and 'alkali' in the tests- like non-reducing sugars?

@MissEstruchBiology

3 жыл бұрын

Hello, No, its not specified on the specification. Just need to know it is 'boil in acid' and then add alkaline to make slightly alkaline as that is required for Benedicts

@sofiasolanki7839

3 жыл бұрын

@@MissEstruchBiology Ahh ok, thanks so much!

Very helpful

@MissEstruchBiology

3 жыл бұрын

So glad it helped you 😊

Hi :) I'm confused. In my book it says that for the buiret test for protiens that you need to add Sodium hyroxide solution to the test sample, then add Copper(II) sulfate solution. I'm not sure, in an exam situation, what to put to get the marks. Your explanation or the textbooks, OR is it the same thing? Thanks :))

@MissEstruchBiology

3 жыл бұрын

Hello, Those are the chemicals that biuret is made of, so you can say either in the exam 😊

Hey miss, is it fine if i use some of the picture of your videos for my flashcards, non-commercial use. I would really like to take pictures of your tests and a few diagrams for my anki deck

@MissEstruchBiology

Жыл бұрын

Hey yeah of course, that sounds like a good way to make flash cards

can please elaborate on how much you're adding like how many drops of acid

Thanks so much for the video! Really helpful. I have a small doubt if you could answer. What exactly is the reagent in the lipid test? Is it ethanol or distilled water?

@MissEstruchBiology

2 жыл бұрын

There isn't a single reagent, both are required and both are worth separate marks in the exam. Hope that helps 😊

@AS-qi2lq

2 жыл бұрын

Thank you!

@AS-qi2lq

2 жыл бұрын

And also one more thing, is emulsion and turbidity the same thing?

@MissEstruchBiology

2 жыл бұрын

no, turbidity is a measure of cloudiness, but emulsion is the technical name for a fine dispersion of minute droplets of one liquid in another in which it is not soluble or miscible.

Hi Miss, for the test for proteins, do we just need to say ‘add Biuret solution’, because I was doing some questions from the revision guide and in the answers it says ‘add a few drops of sodium hydroxide solution, then add some copper (II) sulphate solution’.

@MissEstruchBiology

3 жыл бұрын

Hello, For AQA they accept either answer, so I always say biuret as it's less to remember 😊

@AS-mw6pw

3 жыл бұрын

@@MissEstruchBiology ok thanks Miss

Hello. This video explained the biochemical tests really well, thank you! May I ask that I don't still get why the non-reducing sugar (sucrose) is not able to reduce the copper sulphate. Lactose and Maltose are also disaccharides, so how is this different to Sucrose, may I ask why aren't they non-reducing sugars. I hope that makes sense. Thank you Miss Estruch.

@MissEstruchBiology

3 жыл бұрын

Hello, Its because of the monomers sucrose is made of. Because it contains fructose, unlike the other two disaccharides, it forms a bond that prevents it from reducing Benedicts. Have a look at the pics in this link images.app.goo.gl/Nmo2ErcbUMPaURRS8 Hope that helps 😊

Which acid and alkali have you taken for the non reducing sugars?

Hello miss , I know this isnt part of the video , but im a 2 year a level student , i have my A LEVEL paper 1 exams in about 3 days , should i go through AS paper and A LEVEL PAPER , or should i just go through a level past paper

@MissEstruchBiology

3 жыл бұрын

Hello, It depends how much time you feel you have. The A-level papers should be a priority, but the AS papers do have a lot of really good maths questions and practical questions in too that will be helpful. If you have time, then yes I would recommend you do. Good luck!

@aaronrajimon312

3 жыл бұрын

@@MissEstruchBiology ok thank you soo much :)

Just wondering, were we supposed to know oil is a lipid? Just a bit concerned because I didn't really know that Thank you!

@anittajose

2 жыл бұрын

yes, it's an unsaturated fat

Hi Miss Estruch .Firstly thanks for the fascinating videos .I would like to ask about the negative result on lipids .Hmm what's the negative result

@MissEstruchBiology

3 жыл бұрын

The negative would be no white emulsion. There isn't a set colour to describe as ethanol is colourless.

@pakohlomani4100

3 жыл бұрын

Okay thanks

cheers

I always thought Biuret was pronounced Bee-oooh-ray. Thats what I get from learning it by myself from a Textbook and no other input (until I discovered your channel of course) :)

@MissEstruchBiology

9 ай бұрын

Very French pronunciation of you !

@darrenpattison7674

9 ай бұрын

@@MissEstruchBiology Haha so true.

Thanks for that madam biology am kyobs science because I knew what I was eating

do we not need to specify which acid and alkaline to add for the non reducing sugar test?

@MissEstruchBiology

3 жыл бұрын

Hello, For AQA it doesn't specify that you need exact names of the acids and alkaline.

@comixgamez3390

3 жыл бұрын

@@MissEstruchBiology Okay thank you very much, I looked them up and they arent hard to remember.

Hi Miss, just wondering about the test for protein, my textbook says to add sodium hydroxide and then copper ii sulfate and observe the color change. just wondering what I should write in an exam?

@MissEstruchBiology

2 жыл бұрын

that is a long description of the biuret test. Both would get a mark, but biuret is much quicker to write

@kamilaAhmedzai

2 жыл бұрын

@@MissEstruchBiology Thank you soo much!!!

Whats the use of distilled water in tests ?do we use distilled water As a control? To compare other tubes with its results

@MissEstruchBiology

Жыл бұрын

yes that's it! It's the control to show it was the test substance causing any changes seen

Thanks mam

@MissEstruchBiology

Жыл бұрын

you're welcome 😊

greatest channel of all time

@MissEstruchBiology

3 жыл бұрын

☺☺ aww you're too kind, thank you!!! Hope the videos are helping you.

Do you know what Reducing sugars we have to learn for AQA are?

@MissEstruchBiology

2 жыл бұрын

glucose, fructose, galactose, maltose and lactose 😊 Sucrose is non reducing

@ell6311

2 жыл бұрын

@@MissEstruchBiology thank youuuu

may i ask how is the starch orange in colour

@MissEstruchBiology

2 жыл бұрын

Starch is colourless. It is the iodine that is orange, and it turns blue/black in the presence of starch

❤❤

@MissEstruchBiology

Жыл бұрын

🙂

Hey

@MissEstruchBiology

3 жыл бұрын

👋

this is wrong for protiens add NaOH then Copper Sulphate and if protien is present it turns purple

@MissEstruchBiology

Жыл бұрын

Hello, that's what biuret reagent is. For most UK exam boards, they require the name of the reagent rather than the chemical composition

@moa7651

Жыл бұрын

@@MissEstruchBiology sorry its cus i do AQA

3:46 if you didn't have file explorer open you would have doxxed your self

@keetanjohal3559

7 күн бұрын

Bit weird

@Wojbest_YT

7 күн бұрын

@@keetanjohal3559 nah but her school logo was there im just saying

@keetanjohal3559

7 күн бұрын

@@Wojbest_YT hahaha lmao join me i will find her school

@keetanjohal3559

7 күн бұрын

@@Wojbest_YT Nvm she goes to woodford county high school for girls

@Wojbest_YT

7 күн бұрын

@@keetanjohal3559 nah u cant that would be L rizz

I hope to speak Arabic because I don't understand very clear

@MissEstruchBiology

3 жыл бұрын

ah sorry, I only speak English

@adamhilai5290

3 жыл бұрын

But can you explain for me food and it's constitunets

@adamhilai5290

3 жыл бұрын

Also digestion of starch

@adamhilai5290

3 жыл бұрын

@@MissEstruchBiology digestion of proteins and lipids

@adamhilai5290

3 жыл бұрын

@@MissEstruchBiology and activity of enzymes because I have exam tomorrow and I don't understand any thing from my teacher because she 60years old

Can't you speak Hind mam?