OCR Biology F212 Revision [3rd June 2013] (Now Closed)

I have done this question before and wrote the first and third points as my answers. This is the way I was thinking in order to answer them


Growth too rapid: A few reasons why chickens growing too quickly might be a unwanted consequence are:

1. Not everyone likes big chickens, some people may want smaller chickens to cook and eat. Also, some scientific research is carried out on chicks, so if they grow too quickly, this scientific research cannot be done.

reduces gene pool / genetic variation / genetic diversity: There are several types of chickens that exist. Big, small, skinny, fat, ability to grow quickly, ability to produce eggs faster etc. If we only bred chickens that grew quickly then we would eventually lose these characteristics and only have fast growing chickens.

Inbreeding: Think of it like this....incest

increased susceptibility to, disease / named abnormality: Once again, incest. If two family members have a child together, it is said that the child is more likely to have an abnormality.

Hope this helps! I feel silly talking about chickens

You can come over too if you want

Pleaaaaase somebody explain what the Hell the differences between collagen glycogen and haemoglobin are?? And what are glycosidic bonds and peptide bonds as im getting them all mixed up

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Do we need to know about metabolism, I dont think i see it on specification

does anyone have the F212 OCR Jan013 paper?
as its not on the website and i'd be interested to find out which topics came up last F212 exam

January 2013 paper and mark scheme

wow thank u so much man,

how did you manage to get hold of the documents so quickly may i ask ?

i think maybe we just need to know the definition?

Guys, what is a microfibril? Is that a part of a cellulose or what? Thanks

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Cellulose molecules covalently bond to one another, forming cross links, and many of these covalently bonded cellulose molecules make a microfibril.
I think?

thank u so much man thats helped.

by any chance do u have the jan13 paper? i really wanna find out what topics came up last :s

Cellulose molecules covalently bond to one another, forming cross links, and many of these covalently bonded cellulose molecules make a microfibril.
I think?

i think maybe we just need to know the definition?

Hey dude, they're not covalently bonded. Cellulose molecules form glysocidic bonds with each other and this is an example of a condensation reaction because a water molecule is released. Also, they are joined together by hydrogen bonds because their hydroxyl groups are antiparallel. Hydrogen bonds form between the anime and carboxyl groups