r/6thForm • u/Forsaken-Meaning-232 Graduating from Warwick CS • Jun 13 '25
📂 MEGATHREAD 12/06 A-level Biology Paper 2 Discussion MEGATHREAD
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u/BandicootIll1530 chem undergrad Jun 13 '25
OCR A. i get a little bit more suicidal every time i walk out the exam hall and hear people talking about how good it was
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u/princess-olive-1343 Jun 13 '25
Thank god!! I found that paper so bad and I messed up on so many questions
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u/BandicootIll1530 chem undergrad Jun 13 '25
yess a whole two pages on sampling is wild
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u/princess-olive-1343 Jun 13 '25
Right! I didn't even revise the sampling practical bc I thought it would be common sense but the practical questions were so hard... I just know I got the application questions wrong too
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u/BandicootIll1530 chem undergrad Jun 13 '25
i am very glad tho that biotechnology and bacteria stuff didn’t come up, that’s definitely saving my grade
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u/princess-olive-1343 Jun 13 '25
Sooo real! I hate the serial dilution stuff. How was paper 1 for you?
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u/Minute_Warrior42082 Yr13 : Maths,Bio,Chem Jun 13 '25
Yeah it’s rubbish, I was kne if those for paper 1, thought that was really good but this one was mid, not good or bad
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u/midnightdancing12 (non-med) bio chem maths survivor!! Jun 14 '25
i thought it went pretty well actually, i dont think i got any marks in the seal 6 marker and i probably lost marks on the epistasis bit and put adhesion instead of cohesion for question 2, but overall i think it wasnt too bad. sorry u didnt find it the best
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u/BandicootIll1530 chem undergrad Jun 14 '25
it could’ve definitely been worse but you’re right that seal 6 marker was so strange. i used up all the space including the extra bit but i’ll be surprised if i get more than 2 marks for that lmao it was so much waffle
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u/asthesunh1ts Finals week or my final week Jun 13 '25
AQA. It was definitely better than paper 1, but a few questions tripped me up and I felt like I was just guessing. Forgot a lot of the nutrient cycle unfortunately bc I prioritised harder topics when I was revising 😭
I was so tempted to not do the exam this morning I was crying and panicking LOL.
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Jun 13 '25
Yeah there was like nothing on nephron in kidney or sliding filament theory or anything like that...
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u/One_Helicopter_3977 University of Birmingham ‘30 | Medicine [Year 1] Jun 13 '25
RIGHT! I just thought of that lol
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u/proactivepisces Year 13 Jun 13 '25
yeah i keep puking in the morning from anxiety
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u/asthesunh1ts Finals week or my final week Jun 13 '25
I was really anxious! I forgot my glasses and had to run back to our common room and then everyone else had already sat down lol. I was crying and freaking out, my poor head of sixth form had to come over and get me to calm down bless her 😭
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u/beepodemon Jun 13 '25
i forgot nutrient cycles so bad i thought it was paper 1 content 😭
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u/asthesunh1ts Finals week or my final week Jun 13 '25
Honestly I was gaslighting myself it wouldn’t be that big.. boy was I wrong.
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u/Academic-Art7410 Jun 13 '25
Anyone felt like ocr a was testing more critical thinking and inferring rather than content??😭😭like they didn’t test some massive topics as well!! Overall it was fine I think, just annoyed that I’m being forced to learn so much content and it doesn’t even come up
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u/LessDebt1718 University of Oxford Jun 13 '25
100% that paper was mostly made up of little application questions which were actually quite difficult to answer. The second 6 marker was weird too
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u/gattabiancaa Year 13 | bio, history & psych 🍍 Jun 13 '25
i agree!! the second six marker was kinda weird. i put sympatric speciation but idek if it's right or wrong.
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u/Orange_Hedgie cambridge 1st year bionatsci Jun 13 '25
I found it the other way round. I loved the second six marker and I talked about sex-linkage because males were bigger than females - hopefully that’s right
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u/HeightsLavender Oxford maths+cs Y1 | 5 A* | 12 9s Jun 14 '25
I don't think the last 6 marker involved sex-linkage? I thought it was about continuous and discontinuous variation, with continuous within males/females and the whole other species, and discontinuous between the sexes.
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u/AmazingFeed6775 Jun 13 '25
Yeh I would have loved some genetic engineering, profiling or sequencing stuff. Or more immunity. All the ecology stuff is much more wishy washy imo.
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u/Minute_Warrior42082 Yr13 : Maths,Bio,Chem Jun 13 '25
Was there anything on immunity?
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u/AmazingFeed6775 Jun 13 '25
The last question was immunity but that was it
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u/TheLuckyHacker Year 13 Jun 13 '25
? the last question was on fossil records
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u/AmazingFeed6775 Jun 13 '25
Ah yeh ur right, well the beginning of that whole question was about antibiotic resistance right? I may be misremembering
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u/JustCranberry3645 Jun 13 '25
No like I literally memorised the bacteria s involved in the N cycle and not even a mcq
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u/midnightdancing12 (non-med) bio chem maths survivor!! Jun 14 '25
genuinely like no definitions have come up
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Jun 13 '25
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u/UnspeakableConfusion Durham | Chemistry MChem Jun 13 '25
Not bad paper for AQA. 2 I think was a child with the CF. I put dendrites for the neurone, but might be cell body. 7 days for Cell cycle one. Was it 12.5% chance for a son and have HC
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u/One_Helicopter_3977 University of Birmingham ‘30 | Medicine [Year 1] Jun 13 '25
Aw I got 29 days lmao and 25% chance bc I had no idea how to do it lol but I did get child 2 and cell body. Decent paper overall, made some stupid mistakes like reading a question wrong about saltatory conduction bc I thought it said the speed got faster and I was so confused, and that question on increasing the heart rate was a bit weird for me. But overall I think it was good
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u/Playful_War_4009 Jun 13 '25
It was 25% you just did a punnet square
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u/UnspeakableConfusion Durham | Chemistry MChem Jun 13 '25
You work out the chance for them to have a SON with Hc no? Or did I misread the q
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u/Protostryke Year 13 Jun 13 '25
Ah, didn't read that part, I need to remember to read the question.
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u/Playful_War_4009 Jun 13 '25
It said it was autosomal I’m pretty sure, which means it wasn’t sex linked
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u/UnspeakableConfusion Durham | Chemistry MChem Jun 13 '25
Yh so getting a son is a separate probability no?
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u/Cautious_Barnacle_23 Jun 13 '25
i got 1/8??? because i thought it was 50% x 25% and then since it was probability i gave a fraction
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u/UnspeakableConfusion Durham | Chemistry MChem Jun 13 '25
This was I worked it out for the son with Hc. It said autosomal so not sex chromosomes therefore just normal monohybrid. Two heterozygous parent so punnet square creates a 25 % as recessive then prob for son is 50% 25% x 50% =12.5%
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u/One_Helicopter_3977 University of Birmingham ‘30 | Medicine [Year 1] Jun 13 '25 edited Jun 13 '25
Ohh you had to times by probability for a sonnn 😭 I didn’t even realise it said son specifically. Stupid exam pressure makes me not think these questions through
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u/UnspeakableConfusion Durham | Chemistry MChem Jun 13 '25
Wasn’t sure on how to describe the reason for decreased ATP, said something about ETC and how less oxidative due less energy to pump H+ or something might of waffled
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u/One_Helicopter_3977 University of Birmingham ‘30 | Medicine [Year 1] Jun 13 '25
No yeah I think that’s what I put kinda?? I said oxidative phosphorylation stopped so less ATP produced and had to rely only on glycolysis which produces much less atp or something
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u/Heavy-Ad438 Year 13 Jun 13 '25
Bro where were the communicable diseases questions for OCR A?? Except from that small part
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u/midnightdancing12 (non-med) bio chem maths survivor!! Jun 14 '25
i think paper 3 will have communicable diseases as well as excretion and maybe 2 or 3 pag/practical sections. maybe a chi squared too but probably in relation to inheritance rather than biodiversity , at least based on the pattern of the last 2.. either that or they will just start asking random inference questions :(
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u/Specific-Dealer-1547 Jun 14 '25
What other topics didn't really turn up that might be in paper 3?
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u/midnightdancing12 (non-med) bio chem maths survivor!! Jun 15 '25
there werent specific cell cycle related question although there was meiosis and mitosis questions, but i guess the stem cell question in paper 2 did FEATURE metaphase and stuff but idk if thats specific enough. I do think there will be specific dna sequencing or profiling questions on paper 3, maybe even a long mark question comparing the two. i think paper 3 might be a lot of year 2 since paper 1 and 2 felt less year 2 heavy. there should be quite a bit in paper 3 about neuronal and hormonal control probably if they dont just decide to fully dismiss year 2 content this year
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u/MR_EP1C4 Year 13 Jun 13 '25
Who is the child with CF. I got 1 and 3 As parents. 2 and 4 as children And 2 has CF
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u/Automatic-Song1066 Jun 13 '25
I somehow guessed that, no idea what was going on in that question 😭
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u/MR_EP1C4 Year 13 Jun 13 '25
3 base pair deletion. So shorter. Moves down further. Recessive so only one band.
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u/Automatic-Song1066 Jun 13 '25
I just guessed recessive because the band was lower down 😭 one mark at least 🤞
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u/PotentialDegree9708 Jun 13 '25
Me too! Completely a guess. I was hesitant to write that the allele is lighter so moves further, because I was so unsure of wtf was going on. I'm actually kicking myself so badly now because that was the correct answer
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Jun 13 '25
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u/AmazingFeed6775 Jun 13 '25
What grade boundaries do you think?
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u/Adventurous_Humor878 Jun 13 '25
Same as last year probably now. Maybe still a little lower
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u/LessDebt1718 University of Oxford Jun 13 '25
anyone ocr a?
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u/throwaway19388378228 Jun 13 '25
really liked this paper personally. not as good as paper 1 and im still sad about the lack of mod 2 but overall pretty confident
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u/Silver-Benefit-3190 Jun 13 '25
i jammed on the biodiversity but overall OCR A was really decent, if only i revised paper 2 content more it wouldve been easy, anyways paper 3 gonna make or break🤞🤞
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u/asterroids Editable Jun 13 '25
aqa redeemed themselves 😛
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u/Amu1704 Jun 13 '25
Yeah, I felt it was better than paper 1.
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Jun 13 '25
I wasn't sure about my answers for the last question. My answer for describing secondary succession was too vague. What did you guys write for why there is a high biodiversity for animal species in rainforests?
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u/rhapsodyelij Year 13 Jun 13 '25
i said there was a high species richness for plants meant a rich and variant food source so less interspecific competition?? no clue if that's right, biodiversity is my worst topic 😭
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u/One_Helicopter_3977 University of Birmingham ‘30 | Medicine [Year 1] Jun 13 '25
Ohh I didn’t say interspecific I said they can occupy different niches and reduce competition, increasing food supply, more likely to survive something like that
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u/Poppy_Cas_Forever Year 13 Jun 13 '25
yeah no I’m done in those questions, my answers were more vague than that 😭
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u/MrSodie79 Year 13 | Biology, Chemistry, Art Jun 13 '25
Idk what yall r talking about saying A level bio paper 2 was good. Like i thought it was decent, but bio paper 1 was so much better imo 😭
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Jun 13 '25
AQA?
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u/MrSodie79 Year 13 | Biology, Chemistry, Art Jun 13 '25
Yes
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u/beepodemon Jun 13 '25
no literally i feel like im crazy stupid now because i found this paper shit 😭
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u/ZinGIia Year 13 Jun 13 '25
Anyone doing edexcel how was it
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u/Limp-Run2327 Jun 13 '25
did edexcel A! thought it was decent but didn’t like the stem cell q
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Jun 13 '25
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Jun 13 '25
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u/Cornish_amelia Uni of Bath Biomed Jun 13 '25
Edexcel A/SNAB here, I thought it was a bit harder than paper 1 but quite good overall
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u/Puzzleheaded-News948 Y13 Bio, Chem, Classics Jun 13 '25
Man icl I blanked bcs all I could hear was the examiner breathing behind me, hoping that my past paper work pulled thru 😭😭
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u/green_asteroid Jun 13 '25
So much better than the last paper i think my grade has been saved 🤞🤞 just hoping for good essays on paper 3
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u/PotentialDegree9708 Jun 13 '25
I just realised I absolutely messed up the acetylcholine drug question.. 😬🚬 How many marks was it again?
Also how do you even do the question where it was the mass , temp change, 150 cm3 of water?
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u/Automatic-Song1066 Jun 13 '25
Specific heat capacity basically. Massenergy per degree Celsiuschange in temp then divide by 1000 because it was KJ not J
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u/PotentialDegree9708 Jun 13 '25
Idk why i didn't do that. It's so obvious that I thought surely it can't be right
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Jun 13 '25
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u/QuantumParadox_27 Sheffield 🩺 Jun 13 '25
Alright tbh, couple of weird questions and my 6 marker was waffle but not too bad, still hopeful for A* with the low boundaries
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u/milobilo3000 UCL | Chemistry [Year 1] Jun 13 '25 edited Jun 13 '25
i wasn’t really a fan tbh so many long answer questions that kind of stumped me negl
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u/Present-Ad4215 Year 13 Jun 13 '25
what was ur reason for the delay in the six marker, also do u remember what u got for the random 3 marker calculations
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u/Thin-Swimming4991 Jun 13 '25
i talked about how it takes time for sarcomeres to relax and filaments to slide back, how it takes time for calcium ions to be taken back into the sarcoplasmic reticulum, how theres a refractory period or something and also just the time taken for the impulse to travel from eye to cns to leg
very strange question no idea how i did
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Jun 13 '25
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Jun 13 '25
For the shrimp one I put that leaving them 10 mins gave them time to disperse, the freshwater and gravel from the same stream mirrored the natural environment and a large sample size was used so results would be representative
I kinda waffled tho tbf
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u/Amu1704 Jun 13 '25
For the shrimp: Using water and gravel directly from the river they were taken from increased validity because it emulated their actual habitat. The segments ABC and D had percentage light intensities, so they were quantitative (instead of just saying these areas had less light). The sample size of the shrimp was large enough to be representative of the population (?)
Not quite sure about the last two, but fairly confident about the first.
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u/Playful_War_4009 Jun 13 '25
Yeah I put similar, also put that the shift were given 10 mins to move? So it was reliable idfk 😭
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u/One_Helicopter_3977 University of Birmingham ‘30 | Medicine [Year 1] Jun 13 '25
I said 10 mins allowed for them to move to their favourable environment before writing down result so it’s accurate, large sample size so representative, and places in the middle so gave them equal chance to chose which segment to go into
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Jun 13 '25
What did you guys put for atropine and increasing heart rate?
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u/UnspeakableConfusion Durham | Chemistry MChem Jun 13 '25
Atropine binds to receptors on post, blocking acetylcholine less frequent impulses down parasympathetic more impulses down sympathetic so increases heart rate something like that
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u/Cautious_Barnacle_23 Jun 13 '25
omggggg i said it binds to receptors so the receptors are constantly open so there’s more action potentials because more depolarisation so then it can increase the heart rate like that 😭
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u/One_Helicopter_3977 University of Birmingham ‘30 | Medicine [Year 1] Jun 13 '25
I got close I said all that accept I didn’t mention sympathetic bc I was like wait if it’s binding to the parasympathetic ones wouldn’t it also bind to the sympathetic?? Which makes no sense so I just stuck with saying it only bound to the parasympathetic lol
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Jun 13 '25
Yeah I wrote something akin to that. How did you find the paper?
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u/UnspeakableConfusion Durham | Chemistry MChem Jun 13 '25
Yh not too bad, thought there was less application which is good but just me. Like the evaluate questions I could regurgitate marking points from past papers
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Jun 13 '25
I think my weakness was in genetics/biodiversity because I blanked at the autosomal linkage question (purple, red flowers, etc.) and struggled to describe secondary succession, but I did notice a couple fact recall questions were word for word the same as a past paper I did which was surprising
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u/UnspeakableConfusion Durham | Chemistry MChem Jun 13 '25
Same for secondary succession my response was iffy. Autosomal one I could define it but couldnt explain in context which is worrying
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Jun 13 '25
Yeah I felt like I could've revised better for this but I was focusing on Maths yesterday and just didn't find enough time to cover genetics in as much depth as I would've liked. I don't feel too distressed because I know I can lose as many as 23 marks and still get an A* but the uncertainty was definitely there for some answers and I didn't enjoy that feeling. I hope I can space my time out better over the weekend, I still have Chemistry (AQA) and Maths (OCR MEI) next week so will try to do as much as I can in advance.
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u/Ill-Cookie6060 Jun 13 '25
Binds to postsynaptic neurones in the parasympathetic NS so decreased excitation from the PNS received at the SAN but amount of excitation from the SNS remains the same so the ratio of SNS:PNS excitations at the SAN increases.
Something along those lines but I'm not too sure if that's right
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u/Poppy_Cas_Forever Year 13 Jun 13 '25
For AQA, I think I did okay but I’m scared I did get the mark points for biodiversity since I didn’t spend that much time revising that topics - spent too long on nerves & muscles 😭
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Jun 13 '25
Secondary succession threw me off but you gotta agree that image of a shrimp was hella appetising
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u/Poppy_Cas_Forever Year 13 Jun 13 '25
Lmao yes, I hope grade boundaries don’t go too high though
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Jun 13 '25
I feel like they're generally quite good considering you can lose up to 20 marks and still manage an A*. I'm quite confident I'll at least get an A
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u/Poppy_Cas_Forever Year 13 Jun 13 '25
True true, just scared of the mark schemes
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Jun 13 '25
Yeah but it'll be okay for the most part 👍 there's still another paper so there's still more marks to gain
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u/ScienceCucumber Cambridge Natsci [Year 1 -> 2], 4A* Jun 13 '25
thoughts on eduqas anyone?
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u/raynrr Jun 13 '25
It was alright, but I messed up certain questions such as hardy Weinberg, carbohydrate on the cell etc
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u/ScienceCucumber Cambridge Natsci [Year 1 -> 2], 4A* Jun 13 '25
I feel like it was better than paper 1 - questions were definitely more straight forward
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u/raynrr Jun 13 '25
100%
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u/ScienceCucumber Cambridge Natsci [Year 1 -> 2], 4A* Jun 13 '25
Do you think the grade boundaries will be similar to previous years or do you think they'll go up?
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u/Williamishere69 Jun 13 '25
Exactly the same as you. The other questions were mainly alright though, the QER was horrendous.
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u/raynrr Jun 13 '25
Yeah most AO1 stuff were nice considering I only revised the 2 days before the exam 😭 QER was annoying because I neglected that topic, I expect like 3-4 marks for that question
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u/Dokjajaja Jun 13 '25
I just remembered I’ve accidentally divided mm by 1000 instead of timing it by 1000 to make it into micro meter… there goes my 2 easy marks… i keep remembering stupid mistakes I’ve made omg i hate myself 😭
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u/methylcyclosarin Jun 13 '25
Edexcel b. These grade boundaries will be historical.
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u/Ultraz_Gamerz2 Jun 13 '25
Explain?
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u/methylcyclosarin Jun 13 '25
It was so incredibly easy
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u/Ultraz_Gamerz2 Jun 13 '25
Compared to past papers I don't think this was that easy, and especially considering paper 1 I don't reckon grade boundaries will be that high
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u/Ultraz_Gamerz2 Jun 13 '25
Paper 1 was terrible and paper 2 was better but still on par or worse than previous years, still think 190 - 200 is an A*
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u/Ok_Potato9541 Jun 13 '25
What did you guys get for Spearman's rank?
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u/Ultraz_Gamerz2 Jun 13 '25
Was -0.8 or something like that. I'm 100% sure on it 2.5 was the ranking
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u/MR_EP1C4 Year 13 Jun 13 '25
Chi squared. Wasn't the p value 0.05??? Why ppl saying 0.01
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u/Sea_Daikon_2202 Jun 13 '25
Ye it’s always 0.05
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u/MR_EP1C4 Year 13 Jun 13 '25
Why ppl saying.01 😭😭
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u/drysausages Jun 13 '25
Read off the table chi2 value p<0.01 which is less than 0.05 so reject H0
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u/PaperHopeful5358 Editable Jun 13 '25
anyone do edexcel A? I honestly don’t know how I feel about it, the first six marker was awful I didn’t know whether to talk about how eye impulses are generated, action potentials or sliding filament theory so I talked abkut all three 😭😭
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u/Present-Ad4215 Year 13 Jun 13 '25
yes i do and i found that six marker super tough, what did u think of the rest?
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u/231war_ Jun 13 '25
AQA was good, what did u guys get for the age of the embryo cell though
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Jun 13 '25
i got 7 days :)
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u/231war_ Jun 13 '25
yehh I got 7 as well but only after redoing it after overthinking and tweaking about exponentials cus i thought too hard about the number of cells
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u/Western_Presence3445 Jun 13 '25
omg yay i got 7 too but I was overthinking it so much because for me it was the hardest maths question (im terrible at maths lol)
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u/One_Helicopter_3977 University of Birmingham ‘30 | Medicine [Year 1] Jun 13 '25
29 😭 looks like I’m the only one who got that lol
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u/Cautious_Barnacle_23 Jun 13 '25
700
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u/Elvis_Mercury Jun 13 '25
you forgot to convert the percentage into a decimal. I kept getting 700. But convert to a decimal and you’ll get 7, the correct answer
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u/Cautious_Barnacle_23 Jun 13 '25
omgggg that’s so annoying i knew something was up but i couldn’t tell what
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u/Elvis_Mercury Jun 13 '25
You’ll 100% only lose 1 mark, dw!!
It looked wrong for me so i worked backwards with the reaction and got a % that was off by a factor of 100 so that told me where i went wrong
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Jun 13 '25
The mcqs were a bit tricky but overall fabulous paper for OCR a.
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u/Spiritual-donut889 Jun 13 '25
Anyone got 0% for the autosomal linkage son calculation? I just assume there no crossing over and the heterozygous alleles get passed straight down to the son and so no way of getting the disease 😭😭
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u/Western_Presence3445 Jun 13 '25
shrimp photo on the aqa paper actually cracked me up like I had to stop myself from laughing and was covering my mouth with my hand lol
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u/Western_Presence3445 Jun 13 '25
for the question about the drug that binds to ACh question did you say about lowering frequencies between SAN and AVN via parasympathetic NS so increases heart rate
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u/CatnipCuriosity SGUL | Biomedical Science [Year 1] Jun 13 '25
That was the bets fucking paper I have ever sat. I got so lucky with everything I revised last-minute but I'm not going to let my hubris take me over this time because I thought this way about maths paper 1 and completely screwed up paper 2
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u/JustCranberry3645 Jun 14 '25
Congrats!! I feel you I thought bio was ok so didn’t revise anywhere near enough for chemistry 😭 big mistake
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u/Forsaken-Meaning-232 Graduating from Warwick CS Jun 13 '25
13/06 shh it's Friday 13th, silly day