BIOLOGY PAPER 2

[Sticky]

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

[Nera_egypt]

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 !

[crispy5500]

@Nera_egypt

If u dont mind me asking, why did u choose these particular topics?

[dinar]

I think those topics are the most difficult. I don't really understand them. 
Wish us luck..!!

[sizbeauty]

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)

[sizbeauty]

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

[Nera_egypt]

@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

[crispy5500]

Thanx for the info nera!!

[Candela]

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.

[sizbeauty]

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)

[Candela]

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.

[unknown 101]

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

[sizbeauty]

yupz it really helped.thankyou