Biology B3 Feedback Thread

They are the same thing. I think you had to mention transport molecules.

Hi guys..
B3 it was ok but as always aqa make the biology paper too wordy.
Totally messed up on the products question. Miss read it and put Bread and Beer.

btw what did you put for the two reasons that the stomata are on the bottom side.
Me 1. less water loss due not in direct sunlight 2. no saturation of water can get in in rain because it is on the underside that could waterlogg the plant(the answer is abit dodgy)

my value that i said for protein conc was 0.75 -1 dm^3

What do u reckon the Raw boundaries will be for this? Out of 45 - for A*-c

i put bread and beer to for that questiojm
and our science teacher said that was rihgt
it wasnt asking for the products of the equation, but what products could b made
thats what he said

What did the question actually ask - what are the products of yeast fermentation or what could be made ?

Two Things:

1) Why didn't that dog die?
I blanked and said smaller food molecules can still be absorbed

2) How do you answer that question about the use of dogs?


haha i suck don't I!

Two Things:

1) Why didn't that dog die?
I blanked and said smaller food molecules can still be absorbed

2) How do you answer that question about the use of dogs?


haha i suck don't I!

They are the same thing. I think you had to mention transport molecules.

Can we stick to the right exam please...lol.

moody you'll need around 74% for 100UMS.

I didn't like this paper much. I sat it straight after B2 and I thought B2 was so much easier (even though normally I'm better at B3). I got 93 UMS for B1 and a low A on ISA so 80 UMS minimum, might be more. This means I need 7 UMS over A* between the two papers e.g. 100 and 87 or 93 and 94. Hopefully I did good enough on B2 to make up for B3.

I put yeast fermentation is ethanol and water. I put carbon dioxide and crossed it out . This means I also got the bit about which of the tubes can be used for fermentation wrong . I put the one that didn't have gas but its the ones that did get gas isn't it?

On the last question, I just talked about how beef has more amino acids and wheat has some more, but they provide over your daily amount. And summed up saying beef was better because you need to eat less of it.

I hated the bubble fermenter question too. I put that the bubbles were there to give oxygen and take away carbon dioxide, even though that doesn't make sense. /I said to keep it sterile you should heat product entering it to sterilise them and don't leave the fermenter open to the air. I made it all up.

For diffusion/active transport, I put the concentration gradients and that active transport requires energy.

Hopefully, about 30-32/45 will be 90 UMS. What do you think you'll need for 100 UMS?

Protein concentration: At the beginning as the concentration increased to 0.8 g/dm3 the bacteria reproduced exponentially as they doubled in number. Increasing the concentration to 5 g/dm3 provided only a little more growth, as by this time, as the metabolism of the bacteria generated heat and the ph of the culture changed, the growth of bacteria stopped and reached the plateau phase, where number reproduced = number of bacteria killed.

I didn't like this paper much. I sat it straight after B2 and I thought B2 was so much easier