Відео

I dissected a pig heart in primary school 👀💀

useful, clear video, thanks

Gloves is an important item to wear while dealing with bacteria bruh

Thank you.x

A bit blood on the table

Hello Ma'am , actually i have one problem during squashing the root tips. the stain is moving out of the cells and i can't see any mitotic phase. please give me some suggestion.

I’ve tried this in class but mine is not working I’m not sure what I’m missing

Thx

"Stop Richard" 8:29

Nice work

Amazing

Excellent video! Thank you so much!

Thanks!!

1. Add 10cm^3 of 5% yeast suspension to three boiling tubes labelled A, B, C 2. Add 10cm^3 of 5% glucose solution to tube A, sucrose solution to tube B and maltose solution to tube C 3. Add three drops of Janus Green B indicator to each boiling tube and gently shake to mix the contents 4. Add a thin layer of liquid paraffin (2mm thick) to the top of each boiling tube 5. Leave the boiling tubes until the Janus Green B indicator has changed colour from blue to pink 6. Insert the bung in tube A and stand it in the water bath. The clip should be removed or open. Leave the tube to equilibriate for 5 minutes 7. Close the slip to seal the apparatus and mark the level of the meniscus 8. Use a ruler to mark another line 10mm higher than the miniscus 9. Start the stopclock and time how long it takes for the miniscus to move from its original positition to the 10mm line 10. Repeat 3 times 11. Work out rate of respiration of the different sugars by taking 1000 divided by the mean time for each sugar

got my practical tomorrow super helpful thanks

I am very certain the beetroot vacuole contained a red pigment called betacyanin, am I wrong

Greatly informative video overall, however one small inaccuracy as the chemical source of the pigment is actually Betalain .

Great video .thank u .

thank you

Isnt ethanol flammable

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?)

A small correction here though, at 8:15, the RF value must be smaller than one, not zero 👍

This was really good thank you

Does this video explain all that is given in edexcel IAL core practical 3( I mean the 3rd pactical ? )

Thanks for detailed information...

this is adorable atlist know i uderstand keep the good work up🤗🤗😙

what could you substitute the potato chips for?

can you do this experiment with salt dissolved in water instead of sucrose solution?

CAN THIS EXPERIMENT BE CONDUCTED OVER THE COURSE OF SEVERAL WEEKS RATHER THAN 20 MINS?????

doing this tommorow

Insane how good this is.

hi

good video, I will watch many time

Good video

Thanks❤️

Hold on, I'm at GCSE level, and I'm supposed to be learning this??

لقد ساعدني هذا كثيرا 💜

Increase contrast to make the chromosomes visible

for anyone doing aqa a level biology pmt.physicsandmathstutor.com/download/Biology/A-level/Notes/AQA/Practical-Skills/RP%2004%20-%20Investigating%20Cell%20Membrane%20Permeability.pdf heres the risk assesments and what not.

Thx

what does it mean to have reaches equilibrium in the graph at the end when it levels off

What are the standardized variable in this experiment? And why beetroot and not a carrot ?

You have nice nails.

what are the controlled variables in this experiment? thank you

What was the results?

Where can I get a choice chamber like this one, please?

what stats test would this use?

Hi, what is the reason for using pH7 buffer?

what happen if we don't rinse beet root??

just wondering how the ralationship between absorbance measured by colorimeter and colour intensity of the solution??