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Author Topic: IGCSE Biology Paper 3  (Read 21929 times)

Offline aquarian93

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IGCSE Biology Paper 3
« on: June 09, 2009, 03:50:49 am »
It's been more than 24 hours since i wrote the paper.
wen can we discuss? wen we're allowed to start discussing, any one can start posting their doubts here k.
good luck :)
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Offline thukon

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Re: IGCSE Biology Paper 3
« Reply #1 on: June 09, 2009, 04:59:43 am »
I screwed up the "enzymes from bacteria question". And anybody who wrote genetic engineering, where u put the dna into the plasmid is wrong too.
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Offline annie_angel

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Re: IGCSE Biology Paper 3
« Reply #2 on: June 09, 2009, 05:09:24 am »
yes its rong...u just put da bacteria in a fermentor;add feedstock;it respires and reproduces;and u get the product...it waz a repeated question...plz correct me if i m rong
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nid404

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Re: IGCSE Biology Paper 3
« Reply #3 on: June 09, 2009, 05:17:47 am »
Quote from: annie_angel on June 09, 2009, 05:09:24 am
yes its rong...u just put da bacteria in a fermentor;add feedstock;it respires and reproduces;and u get the product...it waz a repeated question...plz correct me if i m rong

that's right
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Offline annie_angel

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Re: IGCSE Biology Paper 3
« Reply #4 on: June 09, 2009, 05:19:46 am »
Oo Thanks!!! ;D..i thought it would be rong since i forgot to revise the pastpaper! ;D
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Offline thukon

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Re: IGCSE Biology Paper 3
« Reply #5 on: June 09, 2009, 05:20:17 am »
DAMN I HOPE IM NOT THE ONLY PERSON WHO GOT THAT WRONG!!
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Offline goin4dakill

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Re: IGCSE Biology Paper 3
« Reply #6 on: June 09, 2009, 05:21:07 am »
What did u guys put for the nitrates processes????
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Offline QuickSilver

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Re: IGCSE Biology Paper 3
« Reply #7 on: June 09, 2009, 05:22:08 am »
Which Processes?


Which Variant Did You Have?
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Offline thukon

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Re: IGCSE Biology Paper 3
« Reply #8 on: June 09, 2009, 05:22:17 am »
Helps make proteins for growth?
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Offline QuickSilver

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Re: IGCSE Biology Paper 3
« Reply #9 on: June 09, 2009, 05:23:38 am »
Quote from: thukon on June 09, 2009, 05:22:17 am
Helps make proteins for growth?
yupp and enzymers :)
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Offline aquarian93

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Re: IGCSE Biology Paper 3
« Reply #10 on: June 09, 2009, 05:24:29 am »
1) wat did u guys put for the labels of the liver cell?
2) wt did u guys put for the second drawing? hepatic portal vein and small intestine (ileum) rite?
3) how to find the dry mass?
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Offline goin4dakill

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Re: IGCSE Biology Paper 3
« Reply #11 on: June 09, 2009, 05:26:15 am »
Quote from: aquarian93 on June 09, 2009, 05:24:29 am
1) wat did u guys put for the labels of the liver cell?
2) wt did u guys put for the second drawing? hepatic portal vein and small intestine (ileum) rite?
3) how to find the dry mass?


Why do i not remember these questions :( except for the second one. I guess i did a different variant..
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Offline thukon

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Re: IGCSE Biology Paper 3
« Reply #12 on: June 09, 2009, 05:27:16 am »
Liver cells - Nucleus, Cytoplasm, and cell membrane. I hope.
Yeah, hepatic portal vein and ileum
dry mass, i put measure the amount of solution uptaken by the plants., and then subtract from original. I think its wrong.
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Offline annie_angel

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Re: IGCSE Biology Paper 3
« Reply #13 on: June 09, 2009, 05:28:12 am »
Quote from: QuickSilver on June 09, 2009, 05:23:38 am
Quote from: thukon on June 09, 2009, 05:22:17 am
Helps make proteins for growth?
yupp and enzymers :)

1.nucleus ;cellmembrane and cytoplasm
2.thts ryt...but i rote heptic artery... :(
3.heat the organism;mass for 80 degree/at low temperature[so it does not burn];after sumtym weigh the mass and heat again;thn after a while weigh the mass again until dry mass is found
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Offline annie_angel

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Re: IGCSE Biology Paper 3
« Reply #14 on: June 09, 2009, 05:29:27 am »
Quote from: thukon on June 09, 2009, 05:27:16 am
Liver cells - Nucleus, Cytoplasm, and cell membrane. I hope.
Yeah, hepatic portal vein and ileum
dry mass, i put measure the amount of solution uptaken by the plants., and then subtract from original. I think its wrong.
the last part abt subtracting is ryt... ;D
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