AQA BIOL2~3rd June 2013~AS Biology (Now Closed)

Approximately how many marks are you guys getting on the past papers? Also does anyone know the average mark for an A?
Thank you

Is this correct?

In the lungs or any gas exchange surface, the partial pressure of Oxygen is low meaning haemoglobin has high affinity for oxygen
In respiring tissues, the partial pressure of oxygen is low so haemoglobin has a high affinity for oxygen.

Adaptations of Arteries and Arterioles has already came up, so maybe Veins and Capillaries? But I'm not sure if AQA would be that predictable. Those ones your teacher predicted are actually quite nice questions.
Some that could come up...
-Agriculture and deforestation's impact on biodiversity
- how bacteria spread resistance
-how water enters a root hair cell ans travels up roots,( and lower water potential in root hair cell root pressure and cohesion tension, not apoplast and symplast)
- differences between palisade cells and human cells, or chloroplasts, vacuole and cell wall function.

I really hope is isn't on something like genetic diversity or variation, those topics are far too small for such big questions... Or at least I hope they are. Maybe we'll be blessed and get an extra 6 marker like biol1!

Is it normal to just be fed up now

Is it normal to just be fed up now

I am too!

Can someone explain DNA Hybridisation please? Also, the immunological method?

Got a borderline B on a past paper kewfhuwdhcjdcgewcggi and got three exams next week going to fail haha

What's wrong with a B?! And ah what do you have? So sick of exams now !

I just can't be bothered anymore. I obviously care about a levels but I just feel like I've lost momentum ughhh

I've literally just done that one, well in replication, you know the DNA strand unzips right? So split the strand into two and you'll have two single strands, then a new strand joins onto the old strands (remember semi conservative replication so one original strand and one new strand), and so just join those half strands with their complimentary base pairs and you'll end up with two identical strands like the markscheme asks for

It has reached the point now where I'm just so tired of exams and cannot wait until I'm done. Biology on Monday then Chemistry on Tuesday and then I can sleep until Friday.

Because it was on the borderline so could easily be a C in the exam and want an A in something hehe chem the day after and psychology the day after that. Me too! I hate revising, just want the exam over and done with!