[RainOfBoom]

(Original post by Chris..)
i crossed out golgi for SER too then i went ahead and put golgi for the next question dropping yet another mark

same I put SER, but in hindsight, i'm not too sure

[Monster Mnch]

(Original post by Abbers)
could you have put golgi for thge first 2 questions?

I thought 1b said 'name two other components'.

[Jakelol]

(Original post by Abbers)
could you have put golgi for thge first 2 questions?

It asked for two other components unfortunately

[TanishaBellum]

Hi guys,

quick question about the test for a reducing sugar question..

Add equal volume of sample being tested to benedict's reagant;
place test tube in gently boiling water bath for 5 minutes;
orange/brown solution indicates presence of reducing sugar


Would that get me 3 marks?

[Hippokrates]

On the peptide bonds i started talking about being against the concentration gradient, stupid i know. will that get no marks?

[billybobs]

(Original post by TanishaBellum)
Hi guys,

quick question about the test for a reducing sugar question..

Add equal volume of sample being tested to benedict's reagant;
place test tube in gently boiling water bath for 5 minutes;
orange/brown solution indicates presence of reducing sugar


Would that get me 3 marks?

Yes

[Charlotte49]

(Original post by TanishaBellum)
Hi guys,

quick question about the test for a reducing sugar question..

Add equal volume of sample being tested to benedict's reagant;
place test tube in gently boiling water bath for 5 minutes;
orange/brown solution indicates presence of reducing sugar


Would that get me 3 marks?

Your three marks will be for
1/Benedicts Reagent
2/Heat it
3/Observed colour change of solution from blue to brick red if reducing sugar is present

If you didn't say specifically blue to red then you may not get the mark.

I also wrote some stuff about boil with HCl then add sodium hydrogen carbonate to test for non-reducing sugars but I'm sure I didn't need to.

[choco.chip]

hi everyone! what do you reckon will be the grade boundaries for this exam?

[Charlotte49]

(Original post by choco.chip)
hi everyone! what do you reckon will be the grade boundaries for this exam?

They get everyone's results and standardise them so there's no way to tell.

[choco.chip]

(Original post by Charlotte49)
They get everyone's results and standardise them so there's no way to tell.

i know, but do you think the grade boundaries will be high like in jan?

[Charlotte49]

(Original post by choco.chip)
i know, but do you think the grade boundaries will be high like in jan?

It's really impossible to say, because it depends on how many people get which marks. People at my college generally thought it was quite easy. If I had to guess, I'd say they would be pretty high because there were a lot of easy marks.

[Mattywooda]

(Original post by choco.chip)
i know, but do you think the grade boundaries will be high like in jan?

Yeah, I reckon so.

[choco.chip]

(Original post by Charlotte49)
It's really impossible to say, because it depends on how many people get which marks. People at my college generally thought it was quite easy. If I had to guess, I'd say they would be pretty high because there were a lot of easy marks.

okay, thanks, i think i failed this exam really badly :/

[Jakez123]

(Original post by Xiomara)
But surely not much of this would have happened at pH2, due to the enzyme being denatured?

No, because pH doesn't denature enzymes, but what i wrote was that Ph breaks bonds in the tertiary structure of the enzyme thus enzyme-substrate complexes cannot be formed thus products are not formed therefore the solution doesn't change much (well i was totally wrong but eh)

[choco.chip]

(Original post by Mattywooda)
Yeah, I reckon so.

oh dear :/

[izzwizz]

I think for the cyanide one it would expect you to talk about non-competitive inhibitor? As that is what cynaide does, it binds to the receptors prevent Na+ diffusing into the membrane thus the water potential doesn't lower and water doesn't move in? That is a bit from unit 4 though so I'm not sure, but I'm pretty sure the fact no glucose will be produced for active transport won't get you any marks as what about faciliated diffusion?
Anyone know what full UMS has been in the past? The whole point I resat this paper was for full UMS :/

[LegendX]

(Original post by izzwizz)
I think for the cyanide one it would expect you to talk about non-competitive inhibitor? As that is what cynaide does, it binds to the receptors prevent Na+ diffusing into the membrane thus the water potential doesn't lower and water doesn't move in? That is a bit from unit 4 though so I'm not sure, but I'm pretty sure the fact no glucose will be produced for active transport won't get you any marks as what about faciliated diffusion?
Anyone know what full UMS has been in the past? The whole point I resat this paper was for full UMS :/

Wot? Think about it logically for a minute, why would they want you to talk about it being an inhibitor, when it clearly stated hat it affects respiration. From your knowledge, you shud know how sodium ions get int the cell, by active transport, what does active transport require? Energy, so no respiration = no anergy released = no active transport = no sodium ions are absorbed.

[LegendX]

You shud be able to take a suitable assumption that the cell has glucose already, why else does the other cell take in sodium, if the other cell had no glucose, the curve would remain the same without inhibitor, I'd you get what I'm sayin.

[LegendX]

100 UMS = 60/60 marks and I'm 99 percent sure.

[LegendX]

Cus theres been this whole speculation that a levels are way too easy, not sure why.