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Mitosis root tip squash - Required practical A level Biology. Method explained & exam questions 

Miss Estruch
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In this video, I go through the mitosis root tip squash required practical. Learn the equipment used and why certain techniques are used. Learn the method and how to calculate the mitotic index.
At the end, I go through common exam questions linked to this practical.
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5 авг 2024

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Комментарии : 47   
@hadiraheem6224
@hadiraheem6224 2 года назад
Honestly so helpful
@lizziex7117
@lizziex7117 2 года назад
Thank u so much for these vids Miss - honestly invaluable for my A Level Biology x
@MissEstruchBiology
@MissEstruchBiology 2 года назад
So glad! Hope this helps with the practical 😊
@iqrahnaz2466
@iqrahnaz2466 2 года назад
Thankyou miss your videos are the best!
@MissEstruchBiology
@MissEstruchBiology 2 года назад
Thank you 😊 So glad you find them helpful!
@misa7128
@misa7128 11 месяцев назад
Thank you for the amazing video! The informations were very clear and easy to understand. I am taking the exam next month, I am homeschooled, so I don’t have the opportunity to do the experiment hands on so I am very thankful for the helpful information 😊
@MissEstruchBiology
@MissEstruchBiology 11 месяцев назад
You are so welcome!!! Best of luck with the exam
@iqras3016
@iqras3016 2 года назад
Hi, in Maths Made easy, the answer to the use of HCL is to stop mitosis from occurring, but here it says to soften the tissue, which one would i write in the exam?
@ExamCrackerNova
@ExamCrackerNova 5 месяцев назад
Both are options in the markscheme. Either answer will get you a mark.
@peacewilliams5867
@peacewilliams5867 2 года назад
Hi please i need more risk assessment for this practical please
@birdie7344
@birdie7344 7 месяцев назад
thanks a lot miss!
@MissEstruchBiology
@MissEstruchBiology 7 месяцев назад
you're welcome 😊
@Mifty_boy1
@Mifty_boy1 2 года назад
Thank you😀
@MissEstruchBiology
@MissEstruchBiology 2 года назад
You're welcome welcome 😀
@daisyeb
@daisyeb 2 месяца назад
If you can see two nuclei in the cell (indicating telophase (?)), do you include these in the mitotic index please?
@vickie1805
@vickie1805 6 месяцев назад
why do we grow the garlic in the dark? Thank you for your amazing lessons!
@ryou6453
@ryou6453 9 месяцев назад
Single handedly Carrying us
@MissEstruchBiology
@MissEstruchBiology 8 месяцев назад
☺️☺️
@M0_4D4M
@M0_4D4M 8 месяцев назад
I have a question which I have been stuck on for ages. Hi would you draw a results table?
@JckxVFX
@JckxVFX 2 года назад
do you also need to macerate the root tip end do create a single layer of cells so the light from the optical microscope can pass through? thanks also video was v good :)
@MissEstruchBiology
@MissEstruchBiology 2 года назад
Yes 😊
@cherrycolagames3187
@cherrycolagames3187 2 года назад
For calculating the mitotic index, should my answer always be 2dp (2 decimal places) or will I get how many decimal places or significant figures are needed in the question?
@MissEstruchBiology
@MissEstruchBiology 2 года назад
If its not specified in the question then 2dp is a good standard
@cherrycolagames3187
@cherrycolagames3187 2 года назад
@@MissEstruchBiology Thank you for letting me know :)
@maryam9056
@maryam9056 2 года назад
Tysm
@MissEstruchBiology
@MissEstruchBiology 2 года назад
you're welcome 😊 Hope it's helpful
@heatherangove3154
@heatherangove3154 Год назад
Is there a specific reason that garlic or onion needs to be used?
@epicprobg1876
@epicprobg1876 2 года назад
Maam in the practical paper will we only have the practicals given in our separate biology lab book? ( I'm studying edexcel AS level)
@thriyampakandhivyakrishnan2434
@thriyampakandhivyakrishnan2434 2 года назад
Nope, there would be additional questions beyond the core practical.
@epicprobg1876
@epicprobg1876 2 года назад
@@thriyampakandhivyakrishnan2434 Thankyouu!
@user-pb2sr2tq1t
@user-pb2sr2tq1t 3 месяца назад
Hi miss, what is the concentration of HCL used when placing the root tip in a water bath? Thank you
@tamerzaghlol9461
@tamerzaghlol9461 2 месяца назад
2cm3 volume .. u can choose whatever conc
@rmzfbrmz
@rmzfbrmz Год назад
For this practical when we're calculating mitotic index, in the video you mention it's a percentage. However, when we did a mock I didn't get a mark when I times by x100. For mitotic index do we x100?
@MissEstruchBiology
@MissEstruchBiology Год назад
Sometimes they require it as a percentage, but sometimes remain as a decimal. The units given should indicate this
@rmzfbrmz
@rmzfbrmz Год назад
@@MissEstruchBiology thank you 🙏it was 2022 paper 3 on the ms it said reject percentage
@josemanuelgilmunoz1311
@josemanuelgilmunoz1311 Год назад
What is the concentration of HCl ?
@rruki17
@rruki17 9 месяцев назад
Hydro chloride
@amapolafernandez8796
@amapolafernandez8796 Год назад
Hi there! What's the concentration of a hydrochloric acid?
@MissEstruchBiology
@MissEstruchBiology Год назад
Hey, you don't need to know that for the exam
@amapolafernandez8796
@amapolafernandez8796 Год назад
@@MissEstruchBiology Just wondering so that I can do the experiment myself please
@wholeloteditz2228
@wholeloteditz2228 2 года назад
Can u do unit 3 calibration maths plss
@MissEstruchBiology
@MissEstruchBiology 2 года назад
I'm not sure what that is.Is that Biology AQA?
@wholeloteditz2228
@wholeloteditz2228 2 года назад
@@MissEstruchBiology yeah
@user-vq4qy2hq5i
@user-vq4qy2hq5i 7 месяцев назад
In an exam should we multiply the mitotic index by 100 or not?
@MissEstruchBiology
@MissEstruchBiology 7 месяцев назад
no,unless it states give as a percentage
@Caller8194
@Caller8194 2 года назад
hello euan banks
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