AQA Biology AS New Spec - 26th May and 7th June

Original post by SANTR

What did everyone write for the '2 or 3 doses' question?

I put two doses as there were more antibodies left in the bloodstream?

Reply 162

The_queenb

Original post by SM-

How many marks is this?

As the cells grows more and more sucrose is hydrolysed to produce glucose and fructose for respiration to produce atp and energy for metabolic reactions.

...just realised i put glucose is needed for photosynthesis 😭😭 #failing

Reply 163

saulgreen

Original post by laney1999

What did you guys put about the inability of the fatty acid to go into the epithelium cell?

I just put that it was too large

Reply 164

Jumay

3

Original post by NimcoA

i cant remember half the questions. does anyone know what were the two ways in which you can use base sequences something like that
i wrote dna hybridisation and immunological comparison however not sure if its right :/

I sorta described the two processes, so I said compare primary structures and heat complementary strands (In a bit more detail though :P)

Reply 165

liziepie

Original post by CrazyFool229

I don't remember the options at all! Sorry!

The only option I remember is the RNA which I didn't tick and I know that's wrong :frown:

Capsid, RNA, enzymes and something else I can't remember - cell wall?

Reply 166

saulgreen

People are talking about a few statistical tests.... is my school the only one who didn't do statistical tests? I'm pretty sure its not in the spec!! All I know is the sign test from psychology and I know thats wrong so I just left the question blank :|

Reply 167

BamSrown

Original post by CrazyFool229

I got close to 10, 9.something

Did you draw a tangent at 10 minutes and calculated the gradient?

Yeah, I did difference in y of difference in X
My dY value was 100 and my dX value was 10 so 100/10= 10

Reply 168

Original post by saulgreen

People are talking about a few statistical tests.... is my school the only one who didn't do statistical tests? I'm pretty sure its not in the spec!! All I know is the sign test from psychology and I know thats wrong so I just left the question blank :|

http://www.aqa.org.uk/subjects/science/as-and-a-level/biology-7401-7402/mathematical-requirements-and-exemplifications

Refer to section MS 1.9

Reply 169

SANTR

What did everyone get for the concentration question, on what volume of water should be added to the 10000nmol dm/3 solution of the inhibitor?

Reply 170

laney1999

Original post by saulgreen

I just put that it was too large

Same, what about why the lipid substitute couldn't be broken down by lipase?

Reply 171

SANTR

Original post by CrazyFool229

http://www.aqa.org.uk/subjects/science/as-and-a-level/biology-7401-7402/mathematical-requirements-and-exemplifications

Refer to section MS 1.9

how many marks was this question on?

Reply 172

Original post by SANTR

What did everyone get for the concentration question, on what volume of water should be added to the 10000nmol dm/3 solution of the inhibitor?

Was in 90cm^3 of that 10000 mol dm3 and then 10cm^3 water? No idea if that is right .I think I put that down?

Reply 173

laney1999

Original post by SANTR

What did everyone get for the concentration question, on what volume of water should be added to the 10000nmol dm/3 solution of the inhibitor?

10cm^3 inhibitor to 90cm^3 distilled water

Reply 174

liziepie

Original post by laney1999

Same, what about why the lipid substitute couldn't be broken down by lipase?

I put that the extra thing before the fatty acid changed it's shape so it won't be complementary to the enzyme anymore, so no ES complexes would form.

Reply 175

Original post by SANTR

how many marks was this question on?

Might have been two marks - One for identifying the correct test and one for the justification? Can't really remember!

Reply 176

yourawfulness

I found it quite hard(to an extent) but the paper was easier than the specimen one.
What did you write about calorimetry?Was it about the light intensity ?

Reply 177

SANTR

Original post by CrazyFool229

Was in 90cm^3 of that 10000 mol dm3 and then 10cm^3 water? No idea if that is right .I think I put that down?

Yes 10 cm^3 of water. How many marks was it?
I didn't mention the part about 90cm^3 of inhibitor :frown:

Reply 178

saulgreen