POV: tomorrow you have your first official A level practical.
@kohinoorbanerjee4009
2 жыл бұрын
How did you know OMG?
@hallepholana4876
2 жыл бұрын
POV u have mocks 💀
@mrt5193
2 жыл бұрын
@@hallepholana4876 POV you have the actual A-level in two days
@vlsui66
Жыл бұрын
No it's my 4th 😂
@bray8949
Жыл бұрын
@@vlsui66 POV you’re in your 2nd yr and you just found out the test in 2hrs is about a practical you did in 1st yr
@minerawesome28
6 жыл бұрын
My g
@khansaiqbal7945
7 жыл бұрын
Great video - very clear explanations. I just want to point out that for the new OCR Biology A H032 specification, the plots mustn't be joined up on the graph like in the video, although they had to be for the old specification. As there is a general trend, a smooth line/curve of best fit should be drawn through.
@Sam_n9
2 жыл бұрын
this is the only video i've found that has explained the practical clearly and precisely 👏🏽 thank you so much!!
@biologypracticalsandrevisi8066
5 жыл бұрын
Control variables. Same volume of water. Cylinders cut to same size to ensure same surface area in contact with water. Also cut from same beetroot.
@biologypracticalsandrevisi8066
3 жыл бұрын
@stranger things the results beer to be comparable. Tissue from different beetroots may contain varying amounts of the red pigment so give different results. We need to coloured water pouring/decanting into colorimeter cuvettes.
@ranjanabunkar1860
6 жыл бұрын
Ur way of explanation is mind blowing and ur voice is also amazing thanks for this video
@BatMAN-wc4eb
5 жыл бұрын
This is incredible for revision of the practicals, extremely clear and concise thank you very much!
@biologypracticalsandrevisi8066
7 жыл бұрын
Cork borers are available from all scientific and educational suppliers. A chipper can be used instead as the y don't have to be cylindrical. Or just cut similar chips with a knife.
@kpurkayastha2569
7 жыл бұрын
The pigment is actually Betalain, but great video! I will be using this with my class :)
@biologypracticalsandrevisi8066
7 жыл бұрын
Thanks for your comment. I use these little videos quite a lot with my classes. Before they do the practical lesson and for revision. Your correct about the pigment.
@debitoshcreation5383
6 жыл бұрын
Yes ,betalain especially betacyanin
@jaikryan8403
3 жыл бұрын
now this is pog champ
@devakumargrs4007
3 жыл бұрын
Very clear explanation! I use the video to support my teaching. Thanks for the effort.
@jakeandrew6630
5 жыл бұрын
Cool video love this and the beets look fit as well
@biologypracticalsandrevisi8066
5 жыл бұрын
Jake andrew Thank you Jake.
@unepersonneunepersonne3206
6 ай бұрын
Excellent video! Thank you so much!
@presidentobamnaa
7 ай бұрын
Greatly informative video overall, however one small inaccuracy as the chemical source of the pigment is actually Betalain .
@NX-Idiot
3 жыл бұрын
Im just gonna point out that almost EVERY PERSON HERE is a teacher
@carlosandres3747
4 жыл бұрын
You have helped me so much, thank you.
@cheeb1468
3 жыл бұрын
Could you turn captions on please?
@Emma-sp8mf
2 жыл бұрын
just wondering how the ralationship between absorbance measured by colorimeter and colour intensity of the solution??
@kench1
11 ай бұрын
This was really good thank you
@familylover247
Жыл бұрын
What are the standardized variable in this experiment? And why beetroot and not a carrot ?
@preciousomorogbe3570
3 ай бұрын
I’ve tried this in class but mine is not working I’m not sure what I’m missing
@Naveen_4474
2 жыл бұрын
Thank you madam I am a botony student it was really helpful for my main practicles... Really thank you🙏
@astar269
2 жыл бұрын
What kinds of things do you study in botany and does it require you to go outdoors alot?
@Jess_acnl
3 жыл бұрын
This is very helpful, thank you!
@Hannah-zv1xp
2 жыл бұрын
That was really useful, thank you!
@nightking8490
3 жыл бұрын
Very helpful. Thank you !
@proddream3845
2 жыл бұрын
why does the beet have to be in the water for 20 min?
@mariam8614
10 ай бұрын
Why is it important to leave the beetroots in the test tubes submerged in the respective water bath for 20 minutes? (i.e. why not longer or shorter?)
@AmnaKhurram-ut5hv
8 ай бұрын
Great video .thank u .
@muskaanjonathan1431
6 жыл бұрын
This is a great video. Thanks. Are there any limitations of this procedure?
@aafiqilahi7447
Жыл бұрын
Does this video explain all that is given in edexcel IAL core practical 3( I mean the 3rd pactical ? )
@Amp1771
7 жыл бұрын
i was advised to ise red cabbageinsteadecause beetroot was used by another student. would that work the same?
@biologypracticalsandrevisi8066
7 жыл бұрын
It may work. I have never tried it. Good luck with that.
@musabbaig6462
4 жыл бұрын
only here cuz my teacher told me so
@storiesbox3721
2 жыл бұрын
What is the benefit?
@Assassin-pg5gb
5 жыл бұрын
very useful thanks
@IsrarZarif
Жыл бұрын
Good video
@jordynmack1032
4 жыл бұрын
I found it Mrs Iancu :)
@salwageorge3951
3 жыл бұрын
Is a colorimeter and a spectrophotometer the same device?
@biologypracticalsandrevisi8066
3 жыл бұрын
No. There are some similarities but quite different.
@j0664
2 жыл бұрын
Thank you
@kelsiem6930
7 жыл бұрын
For the graph - Do you join the points up with a ruler?
@AnimatedBlast
5 жыл бұрын
Kelsie M no you just do it by hand and hope it’s straight 🤔
@raiannur5084
2 жыл бұрын
@@AnimatedBlast You are actually not suppose to join the points BTW. its a line of best fit. so your dumb comment didnt make sense HLOG
@addiepat6552
7 жыл бұрын
how do you spell the thing that you put the solution in for the calorimeter
@biologypracticalsandrevisi8066
7 жыл бұрын
addie pat a cuvette.
@addiepat6552
7 жыл бұрын
Biology Practical Activities and Revision thank you
@bharatiparida1686
6 жыл бұрын
thank you for the help
@tunatunes
3 жыл бұрын
Why do we use green light
@biologypracticalsandrevisi8066
3 жыл бұрын
The red blue pigment will absorb green light well. It would reflect red or blue light.
@tunatunes
3 жыл бұрын
@@biologypracticalsandrevisi8066 why not yellow
@biologypracticalsandrevisi8066
3 жыл бұрын
You could use yellow but green works best.
@dimitrimilas4170
3 жыл бұрын
Does it matter what colour the colorimeter is set to, and if so, why?
@biologypracticalsandrevisi8066
3 жыл бұрын
Most colours would work to an extent but green works best. Avoid red and blue as they are reflected by the purple pigment.
@dimitrimilas4170
3 жыл бұрын
@@biologypracticalsandrevisi8066 Thank you!
@Emma-sp8mf
2 жыл бұрын
what happen if we don't rinse beet root??
@fatimaghulam8677
6 жыл бұрын
Very Nice!!
@jesse4938
7 жыл бұрын
what would you suggest the risks assessments are
@biologypracticalsandrevisi8066
7 жыл бұрын
No real risks with the beetroot practical except use of a knife or scalpel to cut the cylinders.
@Emma-sp8mf
2 жыл бұрын
how the temperature affects membrane permeability??
@nafisamahjabeen327
Жыл бұрын
what does it mean to have reaches equilibrium in the graph at the end when it levels off
@natalia63532
Жыл бұрын
its becomes and isotonic solution bc the conc of beta lain in the vacuole is the same as in the water
@nhoj3345
3 жыл бұрын
im only here because my teacher wants me here
@edwardsales6122
7 жыл бұрын
Issrar is a beetroot chip
@karangupta8343
4 жыл бұрын
Thanks
@ikramkamal5056
6 жыл бұрын
It ws very helpful👍
@sarangas8688
3 жыл бұрын
What is the principle of this test
@okaythen4565
5 жыл бұрын
Amazing
@jessstoodley7205
3 жыл бұрын
Hello quarantined folks
@gamingarena4678
3 жыл бұрын
Love it
@dominiclockerbie5541
2 жыл бұрын
What was the results?
@nikalove6971
3 жыл бұрын
Can I have the name of equipments?
@ellieleung6907
5 жыл бұрын
Is there any assumption?
@humanitySL
5 жыл бұрын
Why green light?
@elsaritchie7949
5 жыл бұрын
Just for the absorbance of light in the beetroot liquid solution, but in my practical we used blue light. I don't really think it matters too much as long as it is the opposite colour as the beetroot solution (i.e. it's red so blue or green colours are opposite on the colour wheel
@saff1257
3 жыл бұрын
do you need a control tube? what would that be..
@biologypracticalsandrevisi8066
3 жыл бұрын
No control needed
@lailayaqoobi5256
7 жыл бұрын
i am doing my prac on effect of Ph on the permeability of the cell. but i dont know how the pigment is going to leak. what does it do to the membranes. please help
@biologypracticalsandrevisi8066
7 жыл бұрын
Laila Yaqoobi membrane proteins will be denatured by Ph much above or below 7 so the membrane will fall apart and become much more permeable.
@lailayaqoobi5256
7 жыл бұрын
Thank you for your help🙂🙂
@nezlockville3585
5 жыл бұрын
this practical was in my exam
@lightingthunder
5 жыл бұрын
I have mine tomorrow😭😂
@matinbehzadmehr2282
2 жыл бұрын
Good
@seamitchell2073
5 жыл бұрын
would you say this is an example of diffusion?
@biologypracticalsandrevisi8066
5 жыл бұрын
Sea Mitchell indeed it is.
@VonexCS
5 жыл бұрын
why do you keep the beetroot in water?
@elsaritchie7949
5 жыл бұрын
you're testing the permeability of the cell membrane of beetroot at varied temperatures, which therefore means that at different temperatures more or less pigment will move through the beetroot and 'leaks' out into the water in the boiling tube (i.e. at higher temperatures, more beetroot pigment is leaked out) at a set amount of time - say 10 minutes for all temperatures. You must decanter the beetroot solution into another boiling tube quickly to prevent further leakage that would disrupt the results. This solution is used to test the absorbance of light - depending on the concentration of the pigment leaked out, the light absorbed will be more or less, and you cannot just use qualitative data, i.e. just by looking at the concentration to determine the results. The colourimeter checks the absorbance of light in the liquid of the beetroot solution which gives quantitative data.
@nezlockville3585
5 жыл бұрын
and im only watching this now
@vsevolodsolovyev5608
3 жыл бұрын
useful
@sakethdadigela649
4 жыл бұрын
MHS anyone 2020 prac
@tehminabibi5263
6 жыл бұрын
Can u give error in the experiment
@elsaritchie7949
5 жыл бұрын
The betalain comes from the vacuole within the cells of the beetroot which also has a membrane surrounding it, and therefore the betalain has to pass through two membranes to move into the water in the boiling tube. It therefore doesn't really just show the permeability of the cell surface membrane as it also shows the permeability of the vacuole.
@magichoops4240
4 жыл бұрын
We were testing alcohol
@biologypracticalsandrevisi8066
4 жыл бұрын
Emerge that’s a good one. It dissolves the lipid bilayer.
@jiminieee7682
4 жыл бұрын
what can be used instead of beetroot?
@biologypracticalsandrevisi8066
4 жыл бұрын
misheel altan I have never tried it with anything else but it may work with red cabbage.
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