OCR AS Level Biology A Paper 1 - 12th May 2025 [Exam Chat]

Idk

Stages of Meiosis 2 features of homologous chromosomes what are the stages in meiosis that leads to genetic variation they asked about pathogens and immunity memory cells DNA fill in the gaps and DNA enzyme inhibitor for DNA polymerase then it was translocation question then a question on beetroot pracfical how to assess repeatability magnification calculations the conferences for biodiversity and 2 reason why elephant needs transport system elephant ecg and what it would look like if it was tachycardic then uses of stem cells

The Qs on enthalpy profile diagram in p2 was exothermic and was the graph labelled or did u have to label it?
For the mass in the 6 marker do u remember it like was 7.6 something.

hey do u remember anything from paper 2! tysm

6 markers were one on evolution and another evaluation data type application one the lungs spirometer enzymes it’s pretty much the predictions I put up before the exam

WTH is an enthalpy profile diagram and there’s a 6 MARK calculation on paper 2???

Bro the 6 mark calculation was crazy I can’t even explain what was going on ik the maths but not the practical stuff

Do you happen to remember the other questions from paper 1 and two and what topics they were ? If you can ur a life saver 😭

They’re talking about CHEMISTRY not biology there was no 6 mark calcitonin in biology

Bro the 6 mark calculation was crazy I can’t even explain what was going on ik the maths but not the practical stuff

It was just percentage yeild and then purification steps

It gave us densities and I don’t know how to establish that

Do you happen to remember the other questions from paper 1 and two and what topics they were ? If you can ur a life saver 😭

My bad yh it was chemistry for biology paper one you have to know about white blood cells

is there like t and b cells like specific immune response or is it just primary like phagocytosis

all of it

Is there like T and B cells like specific immune response or is it just primary like phagocytosis

The top layer is gonna be the least dense one ? The bottom layer is going to be most dense one

Basically it talked about why there would be a faster secondary response then a primary response and identify cell x which was a b lymphocyte I think

Is it like identify which is what bcs it shows u the cells at the steps of specific immune response or smth