IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => GCE AS & A2 Level => Queries => Topic started by: Sticky on May 13, 2010, 10:55:24 am

Title: BIOLOGY PAPER 2
Post by: Sticky on May 13, 2010, 10:55:24 am
Hey Guys, Predictions for the paper pleaaasseeeee

i personally think they're going to get alot of water questions,something similar to last question in nov 08, EASY =D

and pretty alittle of disease cause nov09 WAS FULL of it :)


goood luckk All :D
Title: Re: BIOLOGY PAPER 2
Post by: Nera_egypt on May 13, 2010, 12:45:15 pm
Well ofcourse u need 2 go through the whole syllabus but concentrate on
- cardiac cycle
-mass flow
-gaseous exchange
-immunity
-Structure of collagen and haemoglobin
-enzyme inhibition
-DNA replication
-TB and malaria
- Nitrogen Cycle
and
;)BEST OF LUCK ! ;)
Title: Re: BIOLOGY PAPER 2
Post by: crispy5500 on May 13, 2010, 01:40:25 pm
@Nera_egypt

If u dont mind me asking, why did u choose these particular topics? :)
Title: Re: BIOLOGY PAPER 2
Post by: dinar on May 13, 2010, 02:30:04 pm
I think those topics are the most difficult. I don't really understand them.  :'(
Wish us luck..!! :)
Title: Re: BIOLOGY PAPER 2
Post by: sizbeauty on May 13, 2010, 02:36:45 pm
i hav a ques,plz sm1 ans..
suggest four reasons why mammals might store lipidz in preference to carbohydrates?(oder than high calorific value and high metabolic water produced,dese two were already givvn in ques)
Title: Re: BIOLOGY PAPER 2
Post by: sizbeauty on May 13, 2010, 02:38:39 pm
i got this guess ppr frm frend of mine(itz almost same)..

*Gaseous exchange
*Infectious diseases
*Immunity
*Transport: in plants- all the pathways in the cell (apoplast n symplast)
in humans- cardiac cycle, pressure graph, etc...
*Nitrogen cycle
Title: Re: BIOLOGY PAPER 2
Post by: Nera_egypt on May 13, 2010, 02:53:34 pm
@crispy5500

Actually I didn't guess these it is my teacher and he says these topics were not given enough importance in the past few papers so he expects them 2 come. And well I think these are the most difficult topics
Title: Re: BIOLOGY PAPER 2
Post by: crispy5500 on May 13, 2010, 03:09:35 pm
Thanx for the info nera!! ;D
Title: Re: BIOLOGY PAPER 2
Post by: Candela on May 13, 2010, 03:13:47 pm
Quote from: sizbeauty on May 13, 2010, 02:36:45 pm
i hav a ques,plz sm1 ans..
suggest four reasons why mammals might store lipidz in preference to carbohydrates?(oder than high calorific value and high metabolic water produced,dese two were already givvn in ques)
wat paper is this?! because i think its an A2 Question.(respiration)
well...its bcoz lipids hav high energy density due to greater no.of Hydrogen.
Title: Re: BIOLOGY PAPER 2
Post by: sizbeauty on May 13, 2010, 03:25:30 pm
well it was in a worksheet given by ma teacher, n lis ma teacher told me tht whnever u mention ans in termz of energy,u hav to talk about no of hydrogen-carbon bondz bcoz it is de oxidation of mainly carbon tht releases energy(u jus said no of hydrogen atomz in ur ans)
Title: Re: BIOLOGY PAPER 2
Post by: Candela on May 13, 2010, 04:22:29 pm
because thts wats written in my book! :)
the energy comes from the oxidaton of H2 to H20
wen reduced NAD & FAD are to ETC...
By the way u dont need this for P2
so the greater the no. of h2 in da structure the greater the energy value.
Title: Re: BIOLOGY PAPER 2
Post by: unknown 101 on May 13, 2010, 05:02:18 pm
Quote from: sizbeauty on May 13, 2010, 02:36:45 pm
i hav a ques,plz sm1 ans..
suggest four reasons why mammals might store lipidz in preference to carbohydrates?(oder than high calorific value and high metabolic water produced,dese two were already givvn in ques)

1) in many mammals it acts as a thermal insulator
2) used to waterproof surfaces usually to prevent  loss of water
3) used in production of materials in mammals such as steriods ( usually mde from cholestrol)
4) used as blubber since it has a low density

hope this helped :)
Title: Re: BIOLOGY PAPER 2
Post by: sizbeauty on May 13, 2010, 08:46:49 pm
yupz it really helped.thankyou  :)