[al_habib]

(Original post by Chihiro94)
Niether have we. Does anyone have any examples or guidance? I want to go ahead and start (I really don't trust my teacher)

lets go through this essay "Transfer Through Ecosystem"

make a plan - jot down all points

2nd Expand on your points.

lets start cracking

An ecosystem comprises all the interactions between all the biotic (living) and abiotic (non-living) features in a given area at a given time. When these features interact, chemical elements, materials and energy are transferred and flow through the various components. This essay will describe these transfers with an emphasis on compounds of carbon, nitrogen, water and energy.

1st paragraph define ecosystem, collate all the points you'll include the rest of your essay in this paragraph.

from the definition, there is abiotic factor that is transferred through ecosystem, expand now,
abiotic factor for instance light
+Light-->absorbed by chlorophyll-->excites e- to high energy level-->ATP formed-->NADPH formed through photolsys-->photlysis replaces the lost e.

+ATP and NADPH used in light independent-->to reduce GP to TP--> TP forms glucose & regenerates RUBP.

+Glucose is used as respiratory substance in the intestinal epithelium-->provide energy for Na-Glucose co-transport-->glucose enters through carrier protein channel using facilitated diffusion into blood.

+In the cytoplasm glucose is phosphorylated to TP-->2 ATP and H produced-->pyruvate formed penetrates to mitochondria if o2 present, if not lactate/alcohol in plants is formed.
pyruvate-->Acetyl CoA, CO2 and H released--> 4C Oxaloacetate combines with 2C Acetyl CoA to Form 6C Citrate in the kreb Cycle.
all the H combines with NAD and FAD to form FADH and NADH.-->this is used in ETC where e- transported through channel proteins in redox reaction-->ATP forms

+Describe how N2 from the air is used to form No3 and explain how this is transferred to the plants.

+How water is absorbed from roots through apoplastic and symplastic pathway to xylem and into the leaves.

hope that helps, if you have questions ask

[Mission]

Results day tomorrow, it should hopefully give me a kick up the butt so I'll actually do work this time.

[ned6494]

Is anyone retaking Biol4 as well as this unit

[kingam]

(Original post by ned6494)
Is anyone retaking Biol4 as well as this unit

im doing bio2 bio4 and bio5

[Chihiro94]

(Original post by kingam)
im doing bio2 bio4 and bio5

Bio 2 and 5. I guess a little silver lining is that we'd have had to have known them for essay anyway. :/

[kingam]

(Original post by Chihiro94)
Bio 2 and 5. I guess a little silver lining is that we'd have had to have known them for essay anyway. :/

yh i suppose so i have had it to be fair what did you get in bio4 then

[Chihiro94]

(Original post by kingam)
yh i suppose so i have had it to be fair what did you get in bio4 then

82 ums. I wouldn't have really wanted to resit anyway, it's the day after my birthday, and I'm pretty sure I'd be in no fit state for a morning exam

[CupcakeFaerie]

(Original post by kingam)
im doing bio2 bio4 and bio5

Same here, bit worried about the essay for Unit 5 but at least I'll still know things from Unit 4 and 2 to help me

[sathu]

http://sciencemathsmaster.weebly.com/

try this site guys it got a useful BIO section with all the past paper questions organised into topic based packs, but the papers section isn't fully uploaded yet.


http://sciencemathsmaster.weebly.com/packs5.html

[EffKayy]

Got an A in biol4 but im SO worried about biol5. How am i supposed to revise for the essay, like I have to know everything from the syllabus?
Are you guys going to revise the previous units then too?

[Picture~Perfect]

I'm doing BIOL4 and BIOL5 in June
I've not started working for unit 5 yet, I'm just finishing up inheritance for unit 4, I'm hoping to start the unit five stuff next week.

[Heyimdec]

(Original post by EffKayy)
Got an A in biol4 but im SO worried about biol5. How am i supposed to revise for the essay, like I have to know everything from the syllabus?
Are you guys going to revise the previous units then too?

Yes, I've already made revision notes for Unit 1 and have the ones from Unit 4, just need to make Unit 2 notes.

[SpringNicht]

A in BIOL4, I'm hating BIOL5 essays though! I haven't done a single essay since GCSE

[sachinisgod]

I love BIOL 5.(so far), Getting As in my muscles and nervous system tests in class

edit- get a life whoever negged

[NutterFrutter]

(Original post by sachinisgod)
I love BIOL 5.(so far), Getting As in my muscles and nervous system tests in class

Unit 5 is awesome, much more interesting than Unit 4. Not looking forward to the essay though.. need to learn Unit 1, 2 and 4 again.

[NutterFrutter]

For anyone who doesn't know... 40/100 marks on the Unit 5 paper are synoptic.

[LifeIsGood]

(Original post by NutterFrutter)
For anyone who doesn't know... 40/100 marks on the Unit 5 paper are synoptic.

Wasn't it just the essay? I need to go through a paper to really see it, I've only gone June 2010 one. Has anyone got access to the June 2011 one?

[NutterFrutter]

(Original post by LifeIsGood)
Wasn't it just the essay? I need to go through a paper to really see it, I've only gone June 2010 one. Has anyone got access to the June 2011 one?

No, it's not just the essay. I think I either read it on the specification or on an examiners report that 40 of the marks are synoptic.

[LifeIsGood]

(Original post by NutterFrutter)
No, it's not just the essay. I think I either read it on the specification or on an examiners report that 40 of the marks are synoptic.

Ah okay, thanks for letting me know! I'm going through the paper now and seeing if it is and I'll have a look at the examiner's report.

How'd Unit 4 go for you?

I have no idea how to start to prepare for the synoptic essay

[amazingacademic]

There's a data analysis part, kinda like a mega how science works worth 15 marks!