(Original post by ZeeBurb)
Some of your answers are worded in a way which may not get marks, e.g peak of oestrogen just before LH peak,
you would probably want to say rapid increase of LH conc shortly after increase in oestrogen conc.
And things like that.
Also your implanon answer would only get 0/1/2 marks I think, the mucus stuff is not on the spec... you would probably have to talk about how progesterone inhibits FSH and LH, so low FSH conc and the follicle does not develop, no oestrogen secreted from developing follicle so lining of endometrium can not build up and no FSH/LH surge associated with high conc oestrogen above the critical level so no ovulation, egg can not be fertilised.
4a) you need to talk about chemoreceptors in the walls of the aorta/carotid artery and also the medulla oblongata, so you'd get 1 mark
5bi) You should talk about how successfully transformed egg cells would glow green in fluorescent light, so it would act as a gene marker
5ci) not sure if they'd have that on the spec, I talked about damage to DNA in the nucleus during transplantation leading to embryo not developing fully. Your answer would suggest it would be impossible to get live births from this method.
6a) include gluconeogenesis
6biii) in this evaluate question you should include a point to support it, like it does keep blood glucose low for quite a long time
I don't think the diet suggestion is strong, I'd talk about how gene therapy would need to be repeated as the cells die, and the cost of such treatment/secondary immune response risks of it not working
8bi) not PCR product, say it moves least far in the gel and is therefore longest fragment, most repeats
8biii) wouldn't 1 band mean you are heterozygous not homozygous for the allele with the repeats
9e) I said that answer, but people have also said that choose a bull which suffers from heat stress less
9g) Talk about variation due to mutation so some individuals will have the lactose tolerance allele and some will not,
then increased reproductive success of individuals with the advantageous lactose tolerance allele in these countries
My answers are more AQA markscheme like