AQA BIOL5 Biology Unit 5 Exam - 22nd June 2011

Ok I need major reassurance. I've been so caught up with chemistry as I was convinced that was going to be my downfall, that I've done no and I mean NO biology. We haven't had a proper teacher all year so everything on the course is completely new to me and I have Monday and Tuesday to learn it all. How likely is it that I can scrape a D with two days revision??

Ok I need major reassurance. I've been so caught up with chemistry as I was convinced that was going to be my downfall, that I've done no and I mean NO biology. We haven't had a proper teacher all year so everything on the course is completely new to me and I have Monday and Tuesday to learn it all. How likely is it that I can scrape a D with two days revision??

Does anyone know "how the structure of cells is related to their function". Nightmare essay title!

Look above, that's your reassurance!

A D? Pretty dooable I would say

Ok I need major reassurance. I've been so caught up with chemistry as I was convinced that was going to be my downfall, that I've done no and I mean NO biology. We haven't had a proper teacher all year so everything on the course is completely new to me and I have Monday and Tuesday to learn it all. How likely is it that I can scrape a D with two days revision??

There's quite a lot of HSW marks so revise that and genetics, maybe neurones if you have time. You'll be alright- won't get an A by any means, but should scrape a D hopefully!

Haha I only wish I could be as positive as everyone else!



Well preferably a C but a D will do.

Well you guys made me feel better nevertheless so THAAAANKS.

Well I was planning on attempting to read the entire module or is that an unrealistic goal? I literally don't know any of it! And how exactly do you revise HSW?? Past papers?

Maybe read over the CGP revision guide and then if there's things you don't get, look it up in the NT text book? That was my plan.

I wish I could but I don't have it! There's so much less to read in there.

God I'm going to be a hopeless student if I ever get into uni.

hey whats the difference between totipotent and undifferetiated cell

None, a totipotent is a undifferentiated cell.

Can I reccomend this excellent video on stem cells for people with 20 minutes to spare....

http://www.youtube.com/watch?v=-yCIMk1x0Pk

Blunt ends = restriction enzyme cuts right through the middle (usually) of the restriction site, leaving two fragments with flush ends (like cutting a strip of paper straight across with sharp scissors)

Sticky ends = restriction enzyme does not cut at the same base on both strands of DNA, thus the cut is "staggered" leaving "sticky" bases on both sides - these bases are called "sticky" because they are not H-bonded, and so will readily H-bond with incoming DNA.

Efficiency of ligation with sticky ends is much higher than with blunt ends.

Advantage of blunt ended ligation is that both the vector and the gene can be cut with a different set of enzymes, yet will still be able to bond to each other. With sticky ends, both vector and gene must be cut with the same restriction enzyme. Though it is possible to control what restriction sites you have on vectors, find the same restriction site on an unknown gene is quiet hard.

Am really confused.. what's the difference between ATPase and ATPsynthase? IS there even a difference? What's the difference?! So many questions aaaargh

I'd guess ATPase breaks ATP down into ADP and inorganic P.
While ATPsynthase makes ATP by joining ADP with an inorganic P

Hey yeah that's what I thought but in my notes It says that ATPase makes ATP and then I googled it and there was contrasting info.

Thanks though!

plus I'm sure my teacher said they were the same thing?