AQA A Level Biology Paper 1 7402/1 - 9 Jun 2022 [Exam Chat]

not sure,but doesnt really make sense to me coz then the example would be why does this one enzyme cataylse 2 substrates,then u can say coz i t has 2 binding sites, i acyually saw a q like that

Guys for the last question where you had compare the fish gas exhange to the mammalian one I said coronary arteries and aorta compared artery and sth along those lines what do you think the answer was actually to this question ?

lol it cant be degenerate code, because that would code for the SAME AMINO ACIDS and the q was saying how could they catalyse the same reaction with Different amino acid sequence. i said the same thing as u did, the same positions of ionic,disulphide and h bonds so same tertiary structure, i mean what else could it be
so dw about it i know the majority of ppl said what we didx

any thread for paper 2??

these should be the links to the other papers:
AQA A Level Biology Paper 2 7402/2 - 17 Jun 2022 [Exam Chat]
AQA A Level Biology Paper 3 7402/3 - 24 Jun 2022 [Exam Chat]

i mentioned that the changes werent in active site so it could still form enzyme-substrate complex?

i mentioned that the changes werent in active site so it could still form enzyme-substrate complex?

I (and a lot of people from my school) found paper 1 very hard, i think that it seems like it was an easy paper because those who found it easy are more likely to say than those that found it hard. I'm sure that you'll be fine, you can do this !

my handwriting is decently neat but during exams the tables are so small and the time pressure makes my handwriting messy

Would they still be able to read clearly? cause what if they can’t be arsed to read it so skip lines and give a random mark

Hb is made up of globin, heme and Iron the RBC is a carrier for Oxygen but it also can bind to CO2 (although this is at a different site)

Without going into pointless detail about RBC’s (irrelevant to this level) I would assume the answer would probably be haemoglobin but without seeing the mark scheme have no idea if the components (heme, Fe, globin) would be acceptable answers

It’s also not many marks anyway and I know how it feels to stress on little slip ups- please don’t worry if you put Fe etc!

tbf - writing “denatured enzyme” is kinda vague for the question as there were two specified enzymes

Okk, I'll put them on google drive and send a link your way, if anyone else is interested Idm sending it.
It's from my school + stuff I found online.

same thooo my teachers literally dont teach us and we've had to learn everything ourselves ! Hate bio

ok cool, i was just worried we were behind 🥲 we're doing homeostasis and gene tech!

hey, I don't know if you still use this website but can you please confirm if the papers the website is selling are actually the 2022 paper 1 exam paper? I want to buy one but I need to be careful with my spendings and it would be great help!