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OCR 2010 A2 Biology Unit 2 - Control, Genome and Environment

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DR_X

my biology teacher wrote this paper, two years ago......and from her style of teaching, I can 99% promise, it will be nothing like the jan paper......

Lol bit of an unfair advantage.
Oh and to everyone else my class has only covered transcription so far...

Reply 101

Tinkerbelle ♥

DR_X

Yeah........

and on the side note, not that I do geology but my school's head of geology also wrote the A2 jan geology paper.........

I'm at an awesome school...... :p:

What school are you at?! That's awesome.

Reply 102

ibysaiyan

Remarqable M

i think march 12th or 14th :biggrin:

your subject teachers will be the first to receive your results.

yea c:P

Reply 103

ibysaiyan

DR_X

Yeah........

and on the side note, not that I do geology but my school's head of geology also wrote the A2 jan geology paper.........

I'm at an awesome school...... :p:

Great

Reply 104

ibysaiyan

Meh

... i got biology notes to make for tomorrow.

Reply 105

ibysaiyan

Main laws to remember in variation and having constant frequency of alleles are: Law of Segregation and Law of independent Assortment.Also whats the difference between genes and alleles.Gene(which codes for a polypeptide) is the location in the dna whereas alleles are different genetic locus which give out a phenotype.

Reply 106

Tinkerbelle ♥

lol ibysaiyan - 4 posts? you appear to be having a conversation with yourself :wink:

Reply 107

I Have No Imagination

I got 3/8 in a mini quiz today and I also have to redo my A2 practical assessment again due to getting 26/40. :bawling:

I'm too dumb for this thread. :emo:

Reply 108

ibysaiyan

Tinkerbelle &#9829

lol ibysaiyan - 4 posts? you appear to be having a conversation with yourself :wink:

yea i get those moments alot, accompany myself LOL... :smile:

Reply 109

ibysaiyan

I Have No Imagination

I got 3/8 in a mini quiz today and I also have to redo my A2 practical assessment again due to getting 26/40. :bawling:

I'm too dumb for this thread. :emo:

Pftt still way better than what i got 11/40, resit is definitely due in fact max in our college was 25... sucks

Reply 110

I Have No Imagination

ibysaiyan

Pftt still way better than what i got 11/40, resit is definitely due in fact max in our college was 25... sucks

Oh damn, the max in our college was like 39!! So I was a disappointment. lol.
I hate practicals so much, exams are my thing. :'(
My resit is going to be on enzymes, I'm hoping that's going to go better.

Reply 111

ibysaiyan

I Have No Imagination

Yea , i am gonna hit for max this time.

RAWR
Today we did stuff on melanin, epistatic,and chi squared. =)
Where chi squared is nothing but an imaginary Greek letter xD. Ermm from what i remember its equal to: sigma(O-E)^2/E
Where O is Observed Value, E being Expected.So as long as you get the result value close to 5% probability your theory is valid, if its above that critical value invalid.
Oh yea also about alleles in rats. Strangely (bb) being for black rats ( which initially i thought would be BB as its just too common lol) we dont need to know all that just the basic principle of epistatic. Where one gene controls over the next dependent gene(hypostatic).So it all starts from the existence of melanin.The way melanin is handled is by the gene A. This gene works on the melanin as to get different colors such as agouti and black.Before melanin being used by gene A comes another Gene called B. Gene B programs enzyme trypsinase(don't need to know that) which modifies trypsin into melanin. So for albinos we have allele bb as they don't produce melanin, hence trypsin->melanin doesn't occur.(for it to happen there least need to be a dominant B allele).
:smile:

Reply 112

ibysaiyan

Wow where did everyone go? =/

Reply 113

Remarqable M

I'm here lol i was so busy with college had no time to contribute :frown:

but i will soon :smile:

Reply 114

Remarqable M

ibysaiyan

Wow where did everyone go? =/

what did you study so far?

Reply 115

Tinkerbelle ♥

Had my practical today. Testing the rate on anaerobic respiration in yeast using different respiratory substrates. Fairly straight forward :smile:

Much prefer quantative to qualitative :smile:

Reply 116

ibysaiyan

Remarqable M

what did you study so far?

Almost done with meiosis and variation stuff ... all about epsistatic genes, rats, mice blood groups most of it, chi squared test.

Reply 117

ibysaiyan

Tinkerbelle &#9829

Had my practical today. Testing the rate on anaerobic respiration in yeast using different respiratory substrates. Fairly straight forward :smile:

Much prefer quantative to qualitative :smile:

hmm did you have all three at once or was it just qualitative /quantitative?Hope you did good grr i cant wait for mine lol

Reply 118

Tinkerbelle ♥

ibysaiyan

hmm did you have all three at once or was it just qualitative /quantitative?Hope you did good grr i cant wait for mine lol

Thanks. Got my compulsory Isle of Wight trip next weekend so I've got another one to do very soon :biggrin:

haa.

Nope not all 3, just did the one. Our teacher spreads them all out nicely usually. Was just quantitative :smile:

Reply 119

Remarqable M

skatealexia

Done all the start of ecyosystems and all biotech.

how far are you on biotech?

so far in my class we have covered biotech+ a bit of As unit 2 - module 1+ 2 recap, and that is all really lol but i like to stay ahead of the game and so started to do some readings(nothin intensive) on module one as i find genetics much more interesting than biotech :p: