Hydrochloric acid is also needed to "kill the cell", this preserves the stage of mitosis the cell is in, STOPPING MITOSIS. In addition it SEPARATES THE CELLS from the tissue sample collected of the root tips, so ensures it can be squashed, and flattened to A SINGLE THING LAYER OF CELLS, SO LIGHT CAN PASS THROUGH.
@@MissEstruchBiology is there a chance you could do this miss? I know its a lot to ask but it would be so so helpful as there are not many resources going through all the maths needed for bio in detail with examples using exam qs etc. I would pay for a resource like this!
10:43 do you seriously have to know this level of detail for each type of reaction to get marks because it seems so excessive. in my booklet it's quite basic, for a temp. change reaction it's just stuff like add the solution to boiling tubes, boil at different temps, add enzyme to tubes and then test rate of production of gas. stuff like that, but obviously with more detail based on what's used in the question. or is that not enough to know, and do you have to know things like what enzymes would be used for what, past the basic knowledge of enzymes such as amylase?
Hi Ms, i hope you're doing well! for CP9 do we have to know that method specifically or is it possible to also use a yeast solution and measure the volume of co2/o2 gven off using a bung and gas syringe
Hello. I wanted to ask are marks deducted if you break the slide that is been given to you for the microscopy question. If yes then how many marks are deducted?
isn't calculating mitotic index simply all the cells undergoing mitosis divided by all observed cells, not multiplied by 100 because it's an index, not a percentage?
On the beetroot practical you said that the proteins in the cell surface membrane denature is that correct because the proteins in their are not enzymes so they don’t denature or am i wrong
Hi, if anyone could help it would be appreciated. So I have been doing an online A-level course and haven't stepped foot in an actual classroom for about 8 years. My course did explain there would be practical's but not much information has been given except the day I do the practical exams and where. Do I need to memorise all of these methods off by heart? do I need to grow an onion incase I need to bring it in? I'm a bit overwhelmed and worried. I basically have 0 lab experience over the past 8 years and my practical's in a month. thankyou for any advice
Could you please explain to me how the practical learning and for the practical endorsement situation works as in how many do I need to learn and are the practicals that I would need to perform going to be anything related to the title of the practical? If that makes any sense could you please help me understand how to learn the practicals and what do I need to learn and how many please, for the AQA exam
@@jakemorgan7242 i found out from other students and teachers that when we go for the practicals mainly for aqa they give us a sheet which is instructions on how to perform the practicals and we dont need to memorise so much of the values e.g. 0.5 mol/dm3 we would instead get given the values to match the scenario i may be wrong but this is what other teachers have told me
Hi Miss Estruch, I came across an AQA past paper question that was specifically about how to isolate a sample of chloroplasts from cells. It had a four mark method. Is this a practical or is it part of the spec somewhere else? It made me panicked that perhaps I did need to know some of the practical methods in their entirety! Thank you!
Hi miss! for the apparatus and technique table, where would we find the answers to put on the flashcards, as I don't have any resources like this from my school.
@@MaluJayakrishnan 😭😭😭 at least we are all in the same boat. Hopefully grade boundaries lower but they are supposed to be like 2019 which isn't good for us
