Qualification > Sciences
ALL CIE BIOLOGY DOUBTS HERE !!!
Sue T:
--- Quote from: Vampire-Love4ever on May 28, 2011, 08:28:16 pm ---From Oct/Nov '05
*Q1b
--- End quote ---
look at the cycle in your text book, how after citrate, you go directly to a 6C intermediate - now after this, th 6C intermediate changes into a 5C sugar after being decarboxylated and dehydrogenated by NAD - the next step also there is decarboxyyy and dehydrogennaa. also, they have included not only th krebs cycle but the link reaction as well - remeber there is decarboxylation and dehydrogenation in th link reaction so, you'll put in th labels at three sites (attached). dehydrogenation is the removal of the hydrogen which here is done by NAD or FAD - so there are two more sites for dehydrogenation also... hope im clear...
Sue T:
--- Quote from: Vampire-Love4ever on May 28, 2011, 08:28:16 pm ---From Oct/Nov '05
*Q1b
*Q2a- don't know how to do (getting stuck in between) & we get the chi square value as 1.8 and so answers to part d & e doesn't make much sense! :S
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so they've described the offsprings and from the appearance of the numbers you should no this 9:3:3:1 ratio is typical of two heterozygous-for-both-alleles type of parent - ive attached th working.. incomplete though
Vampire-Love4ever:
Thank youuuuuuuuu, Sue T!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! <3
Sue T:
--- Quote from: Vampire-Love4ever on May 28, 2011, 08:28:16 pm ---From Oct/Nov '05
*Q2a- don't know how to do (getting stuck in between) & we get the chi square value as 1.8 and so answers to part d & e doesn't make much sense! :S
--- End quote ---
you got a value of 1.8 and in the chi table the values increase as the probability decreases - so - 1.8 lies at a probabilty greater than 0.05 ryt? then once u've established that you say tht the fact that th probability is grater than .05 then, the diffferences between the observed and expected values are insig and only due 2 chance - so the expected ratio of offspring 9:3:3:1 is observed and the assumptions u made (as in th parents being heterozygous) are correct ;)
da_rockstar:
is there any need to go through t test, standard error and standard deviation for paper 4? cuz i haven't seen any questions from there in paper 4's yet. just thought i'd ask and double check.... :D
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