Edexcel A-level Biology B Paper 3 (9BI0 03) - 21st June 2023 [Exam Chat]

For the genetic engineering of soya was the vector the ti plasmid? I put that but thought it could be the bacteria

Why did I think 300 micrograms is the same as 0.3 grams😭

can never tell with this subject and exam board, ive had mocks and tests before where ive answered almost every question confidently and not even gotten half marks. these exams are such a bad way of measuring a students intelligence imo

That is not reassuring at all. I hope I did well enough for Paper 1 and 2 I just can't afford to get a D.

Omg what graph area

They gave us a tiny graph space to plot the concentration and percentage on. It was a 3 mark plot the graph question.

I got -7.6 too but then it depends on how you answer the next question? like if you have a minus value its lower than the critical value and if it's positive then you've got a value greater than the critical

im only talking about a minority of the papers ive done, ive been pretty consistent with As and A*s but sometimes ive been unlucky with harsh mark schemes, plus we dont know the grade boundaries yet, but i think its better to be realistic than hopeful and then be disappointed on results day

I think I got 0.12 if thats what you’re referring to?

Could you not just say "Plasmid"? Did you have to say Ti?

I think for this, you’re answer can be either positive or negative but the critical region when it says 2.02 or whatever is actual + or - 2.02 so it would be in the critical region at -7.64 but because it’s not really normal to get a negative they don’t mention that. I think people who have a negative answer will get full marks on the maths side but struggle to get full marks on the explanation … someone correct me if I’m wrong.