hi our school hasnt provided us with any past paper questions (as in from the old syllabus aswell) has anybody got any links for this i would be extremly grateful thanks
hi our school hasnt provided us with any past paper questions (as in from the old syllabus aswell) has anybody got any links for this i would be extremly grateful thanks
Theres a link with a 500 page Word document in this thread.
Ok, an idea from another thread now. Let's help each other out with revision!
I'll ask a revision question, someone should answer it and ask another question in the same post.
To start off: What are the parts of a sarcomere?
The sarcomere is the distance between adjacent Z-lines, so it doesn't really have parts? Unless I've misunderstood the question? What are the three main stages of the polymerase chain reaction, and its main advantages over the in vivo method of gene cloning?
The sarcomere is the distance between adjacent Z-lines, so it doesn't really have parts? Unless I've misunderstood the question? What are the three main stages of the polymerase chain reaction, and its main advantages over the in vivo method of gene cloning?
Heat to 95C to break hydrogen bonds. Cool to 55C to allow hydrogen bonds to recreate between DNA stand and primer. Heat to 72C as this is the optimum temperature for the Hot springs bacteria's DNA polymerase to function. It attaches the bases to each split DNA strand. In vitro is much quicker, and it can be used when very little genetic material is present (Such as at a crime scene).
Describe the two methods of identifying and isolating DNA fragments for recombinant gene technology (Each mthod uses a certain enzyme)
I need 80 UMS. We still need to finish homeostasis and feedback atm, I've nearly made all my notes in all subjects, time to start hardcore revision! Questions, questions and more questions...
The sarcomere is the distance between adjacent Z-lines, so it doesn't really have parts? Unless I've misunderstood the question? What are the three main stages of the polymerase chain reaction, and its main advantages over the in vivo method of gene cloning?
I was thinking the I bands, H zones etc... never mind
Describe the two methods of identifying and isolating DNA fragments for recombinant gene technology (Each mthod uses a certain enzyme)
Use restriction endonucleases to cut up a desired gene and insert it into a plasmid. Then insert the plasmids into bacteria. Use marker genes (antibiotic resistance, fluorescent proteins etc) to identify which bacteria have the desired gere.
That's one method... I really need to read up on this xD
For other people: Briefly describe what happens to proteins on the cell membrane during an action potential.
Because AQA are foolish and don't do January papers for the big unit so we literally only have the old spec + Jun10 to go off :/
But I do AQA Chemistry as well and they have January papers so naturally I assumed it would be the same for Biology. It is a little unfair though, it's true. I thought Chemistry didn't do Unit 2 or Unit 5 January exams either until I found the Unit 5 ones recently. So maybe there are Biology Unit 5 ones which have been hidden away.