official aqa unit 2 biology: 8/06/2010

what did you write for the cellulose question at the beginning?

Reply 62

Mira1

insoluble cos water cnat diffuse out of cels

Reply 63

what about the one mark question about the un-coded part of the gene (or something like that)?

Reply 64

kerb123

11

apple-sauce

what about the one mark question about the un-coded part of the gene (or something like that)?

That was "intron"

Reply 65

kerb123

That was "intron"

oh...didn't put that. Thanks for letting me know though :smile:

Reply 66

apple-sauce

oh...didn't put that. Thanks for letting me know though :smile:

where was that in the book!!!!!i have never even heard of that.... :confused:

Reply 67

goodboy4444

where was that in the book!!!!!i have never even heard of that.... :confused:

what? In the text book?

Reply 68

apple-sauce

what? In the text book?

Reply 69

diskohuelga

10

Why did drug X in the nafloxacin question stay constant? Anyone know?

Reply 70

goodboy4444

which text book do you use?
I use Nelson Thornes AQA Biology AS, and I didn't see the word 'intron' either in the glossary or the index :/

Reply 71

diskohuelga

Why did drug X in the nafloxacin question stay constant? Anyone know?

I thought it was because they were using a constant concentration of the drug - as opposed to increasing or decreasing the concentration :/
Anyone know the actual answer?

Reply 72

apple-sauce

I thought it was because they were using a constant concentration of the drug - as opposed to increasing or decreasing the concentration :/
Anyone know the actual answer?

increase in the concentration shows that the bacteria which is not yet killed is more resisitent to that anibiotic......and that bacteria was tottaly resistent to the drug X.....i dont if this si write but this is waht i wrote and most of the people college did the samething :smile:

and yes apple suuse i also use the same book....and i have no idea what an intorn is...

Reply 73

eliseruth101

I wrote 12 :L Ahhh I did 6 x 2 :L Oops..

Do you know on the first page with the diagram and you had to label parts A and B.
Was it for starch or cellulose? x

Reply 74

Scarface-Don

17

apple-sauce

I thought it was because they were using a constant concentration of the drug - as opposed to increasing or decreasing the concentration :/
Anyone know the actual answer?

im not sure if it is right but the graph for drugs x didnt show any increase in antibiotic resistant, and the question was to explain it.
well what i put was that antibiotic resistance is due to mutations, and since these occur random and sometimes may not be beneficial to the bacteria. so it was by chance basically that the graph remained constant.

not sure if its right :eek3:

Reply 75

goodboy4444

increase in the concentration shows that the bacteria which is not yet killed is more resisitent to that anibiotic......and that bacteria was tottaly resistent to the drug X.....i dont if this si write but this is waht i wrote and most of the people college did the samething :smile:

and yes apple suuse i also use the same book....and i have no idea what an intorn is...

The annoying thing is that 'intron' is in the specification on the AQA website, but I can't find it anywhere in the text book - I'm still looking though...

Reply 76

eliseruth101

I wrote 12 :L Ahhh I did 6 x 2 :L Oops..

Do you know on the first page with the diagram and you had to label parts A and B.
Was it for starch or cellulose? x

i think it was cellulose.....so part A was a b-gulocose monomer and b was a glycocidic bond or other way round i just dont remember the parts.....

Reply 77