HOW WAS BIOLOGY 42??

[angelgurl]

yes but it required careful thinking for example if u had a 3 marks qs then u might answer quickly with just one point and hence one mark but two think of three different points/explaining took a hell lot of a time for me at least so i ended like 2 minutes before the exam ended as i wrote everything in detail didnt rush through the paper

 

[boy2011]

yes but it required careful thinking for example if u had a 3 marks qs then u might answer quickly with just one point and hence one mark but two think of three different points/explaining took a hell lot of a time for me at least so i ended like 2 minutes before the exam ended as i wrote everything in detail didnt rush through the paper

even i ended the paper 2 minutes before it was lenghty.....

 

[bionology]

yes but it required careful thinking for example if u had a 3 marks qs then u might answer quickly with just one point and hence one mark but two think of three different points/explaining took a hell lot of a time for me at least so i ended like 2 minutes before the exam ended as i wrote everything in detail didnt rush through the paper

well that's good then, no need to get sad if you finished every bit of it

 

[xarak]

guys dnt discuss the paper!! just discuss how it went for the time being or some mod or nibz will come and lock the topic!
anyways the paper was easy but its easy to lose marks couldnt think of much points in some questions for example i had just 1 point in a 3 marks question nd in 5 marks question had only 3 points

had difficulty in time management
there was a cat in our hall and the supervisor thought it was us who were making meowwwwwwwww noise so she took all statements of entry frm PK209 but tht wasnt my centre
it was hilarious............. :lol: :Bravo:

hahaha @ the cat. I was at PK 649- DHA' Public 'School. No AC!! the TORTURE! :evil:
anyway yeah, the paper was LONG! i started freaking out at 10:15 and was at q4 only lol then got serious and finished the paper 3 min before it ended 8)

long??? I was looking for the more questions,lol. Seriously, shouldn't have taken more than 1:30 (at max) barring extraordinary circumstances

@zeebujha:sameee here du-de..i finished it at exact 1 30 nd like looked at the paper twice whter ive missed a page.i guess i got over excited for noein everythin nd rushed up i felt my pen nd paper wud catch fire LOL.

 

[skyfox]

Can we discuss now ? What was your ans in ovarian follice and evolution passage ?

 

[CaptainDanger]

Yes you can...

 

[NIXORCollege]

A- Germinal Epithilium
B- Theca
C- Granulosa
D- Secondary Oocyte

 

[bionology]

no A was ovary wall

 

[NIXORCollege]

ABA stomatal closure essay

1 ref. ABA absence ;
2 H+ transported out of guard cells, actively / using ATP ;
3 low H+ conc / negative charge, inside cell ;
4 K+ channels open / K+ diffuses into cell ;
5 water potential of cell falls ; A decrease in solute potential
6 water moves into cell by osmosis ;
7 volume of guard cells increase / turgor increases ;
guard cells:
8 have hoops of cellulose microfibrils which ensure increase in length rather than
diameter ;
9 have ends that are joined together ;
10 have, thicker inner walls / thinner outer walls ;
11 curve apart / bend, (to open stoma) ;

[8 max]

 

[NIXORCollege]

Gibberellin
11 seed absorbs water ;
12 by osmosis ;
13 gibberellin produced by embryo plant ;
14 passes to aleurone layer ;
15 switches on / activation, transcription enzyme genes / AW ;
16 storage proteins broken down to amino acids ;
17 stimulates synthesis / release of amylase ;
18 amylase diffuses / moves into endosperm ;
19 breaks down / hydrolyses starch to maltose ;
20 maltose to glucose ;
21 glucose diffuses / moves into embryo plant ;
22 provides source of energy for growth of embryo plant ;

[ 7 max] :Yahoo!:

 

[NIXORCollege]

no A was ovary wall

which is the germinal epithelium
ovary wall? how unspecific... idk.. :no:

 

[NIXORCollege]

individuals in population have great reproductive potential
numbers in population remain roughly constant ;
variation in members of population ;
environmental factors
(cause) many, fail to survive / die / do not reproduce ;
those best adapted survive / survival of the fittest ;
(reproduce to) pass on alleles ; R genes
genetic variation leads to change in phenotype ;
changes in, gene pool / allele frequency ;
over time produces evolutionary change ;
new species arise from existing ones / speciation ;

I don't remember the fifth blank but the answer is above

[5 max] :beer:

 

[NIXORCollege]

Immobilizing enzymes
1. enzyme put into (solution of) sodium alginate ;
2. place mixture in syringe ;
3. add drops of mixture to calcium chloride solution ;
4. calcium ions replace sodium ions (to form beads) ;
5. enzymes trapped in beads ;

[2 max]...

 

[NIXORCollege]

Advantages of immobilization
end product not contaminated;
enzyme, more stable/less likely to be denatured;
enzyme recovery easier;
idea of enzyme being reused;
AVP; e.g. cost

 

[bionology]

ABA stomatal closure essay

1 ref. ABA absence ;
2 H+ transported out of guard cells, actively / using ATP ;
3 low H+ conc / negative charge, inside cell ;
4 K+ channels open / K+ diffuses into cell ;
5 water potential of cell falls ; A decrease in solute potential
6 water moves into cell by osmosis ;
7 volume of guard cells increase / turgor increases ;
guard cells:
8 have hoops of cellulose microfibrils which ensure increase in length rather than
diameter ;
9 have ends that are joined together ;
10 have, thicker inner walls / thinner outer walls ;
11 curve apart / bend, (to open stoma) ;
[8 max]

excuse me, wasn't the question on closing of the stomata with ABA
it has to be added that ABA can bind to the receptors of proton pump so H+ does not transports out, and bla bla

 

[bionology]

no A was ovary wall

which is the germinal epithelium
ovary wall? how unspecific... idk.. :no:

how come unspecific? It's mentioned in the application booklet

 

[NIXORCollege]

no A was ovary wall

which is the germinal epithelium
ovary wall? how unspecific... idk.. :no:

 

[bionology]

well might be, both means the same....

 

[bionology]

kindly come to the questions like that zona pllucida and the proteins etc

 

[NIXORCollege]

ABA stomatal closure essay

1 ref. ABA absence ;
2 H+ transported out of guard cells, actively / using ATP ;
3 low H+ conc / negative charge, inside cell ;
4 K+ channels open / K+ diffuses into cell ;
5 water potential of cell falls ; A decrease in solute potential
6 water moves into cell by osmosis ;
7 volume of guard cells increase / turgor increases ;
guard cells:
8 have hoops of cellulose microfibrils which ensure increase in length rather than
diameter ;
9 have ends that are joined together ;
10 have, thicker inner walls / thinner outer walls ;
11 curve apart / bend, (to open stoma) ;
[8 max]

excuse me, wasn't the question on closing of the stomata with ABA
it has to be added that ABA can bind to the receptors of proton pump so H+ does not transports out, and bla bla

yes yes, but we write this stuff first right? =O i wrote this and then wrote that ABA inhibits the H+ pump so causes the stomata to stay flaccid :no: