Biology help

Hey everyone, I am a medical student who doesn't really have time to do any proper, paid tutoring, however I am interested in teaching and helping people in general. I have tutored before, so if anyone is stuck on any GCSE/AS/A2 biology (or chemistry too for that matter) then feel free to ask and I'll help. Also if anyone has any questions about applying to medical school then I can help there too as I was in that position only last year, so it's fresh in my mind. I got 4 A's at AS and 3 A*s at A2 (bio, chem, maths, all above 95%)

Hello!
Can you guide me on exam technique for IGCSE Biology?
Also can you tell me a gcse level explanation of ultrafiltration in the nephrons? Thanks a bunch.

You might need to be more specific on what you mean by exam technique, because each exam will have different techniques, also I didn't do iGCSE, so I don't know if it differs from regular GCSEs or not

As for ultrfiltration, there isn't really much you need to know, even at uni level we didn't go into much detail. But basically, the glomerulus is a cluster of capillaries adjacent to the bowman's capsule in the nephron. The pressure in these capillaries is high, and that high pressure forces out many components of the blood, such as ions, water and small proteins. These then undergo reabsorption in the tubules of the nephron.

I mean most of the time I know what the question is asking and I even have the answer for it but I'm not able to exactly get those markscheme points.

Ohh and what about afferent and efferent arterioles? What is their role?

@AortaStudyMore Did you do A-level Biology with Edexcel? If so, I'm really struggling with the core practicals any chance you could help me out? I'm mainly struggling with remembering the procedures of all the experiments

I did AQA, in a time when we didn't have to know practicals for the exam. Sorry buddy, if you're struggling to remember stuff though, I recommend making flash cards, they really work. If you're struggling with understanding, then you're best asking a teacher (they're paid to help you on this stuff after all!)

@AortaStudyMore Did you do A-level Biology with Edexcel? If so, I'm really struggling with the core practicals any chance you could help me out? I'm mainly struggling with remembering the procedures of all the experiments

When learning the core practicals bullet point and highlight to make it stick. Find previous exam questions on the core practicals and learn the marking points so you don't overload on unnecessary info. Make sure you know your AS practicals too.

Thank you! I'm actually doing AS-level Bio (under the new spec) but will definitely try bullet pointing the procedures of the core practicals and work through exam questions

Are you on the old Edexcel spec?

I completed Edexcel bio last year (so old spec). I haven't looked at the new spec so have no idea what you're practicals are If you're doing as this year and a2 next year on the new spec I can't be very useful! Best of luck

okay so, you're kind of right, but what you're forgetting here is that strength is on a spectrum, anything that doesn't fully ionise in solution is weak, and something that fully ionises in solution is strong. However, something that is weak can still be comparitively strong compared to another weak acid (or base). So yes, you're almost right in saying that a strong acid has a weak conjugate base, but technically, what happens is the stronger the acid is, the weaker the conjugate base is. So a strong acid will make a weak conjugate base, but that conjugate base is on a spectrum from very weak, to not so weak. Likewise, nh3 (which is the conjugate base of nh4+) is actually quite a strong weak base. It's still technically weak, because it doesn't fully ionise, but it actually ionises quite a lot compared to other weak bases. So nh3's kb is relatively high, but the very fact that it has a kb means that it is a weak base. Now, ka of the conjugate base = kw/kb, if you do some maths, this will tell you that the ka of nh4+ is very low, so therefore it is a very weak acid.

So in summary, the stronger the acid, the weaker the conjugate base, and the stronger the base, the weaker the conjugate acid. But weakness is on a spectrum, so you can have weak bases with weak conjugate acids

Hey everyone, I am a medical student who doesn't really have time to do any proper, paid tutoring, however I am interested in teaching and helping people in general. I have tutored before, so if anyone is stuck on any GCSE/AS/A2 biology (or chemistry too for that matter) then feel free to ask and I'll help. Also if anyone has any questions about applying to medical school then I can help there too as I was in that position only last year, so it's fresh in my mind. I got 4 A's at AS and 3 A*s at A2 (bio, chem, maths, all above 95%)

How did you revise for your as exams
I do biology so how did you revise? In order to achieve a grade A! - also you did amazing!

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Hi, can you give me tips for the 25 mark biology essays? They require so much detail and they could be literally anything, so does this mean I need to know all my AS knowledge too? It's stressing me out!

would a glucose test strip be classed as an enzyme test since it uses glucose oxidase?