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GCSE OCR 21st Century B7 C7 P7 - W/C - Monday 20th June 2016

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Original post by realsmilee
This is really random.. :smile:

But why is a virus a vector?

I understand a plasmid is a vector because - they are small rings of DNA, easy to modify - and - they are small and can move in and out of bacterial cells easily.

But, why a virus?..


My guess would be because viruses seek out cells to penetrate into to reproduce, as this is the only way they can - therefore they can easily pass the new genes into cells I guess? Also they're really small? I'm not sure
Does anyone have the mark scheme for the 2015 paper?
Original post by NiamhM1801
My guess would be because viruses seek out cells to penetrate into to reproduce, as this is the only way they can - therefore they can easily pass the new genes into cells I guess? Also they're really small? I'm not sure


Ahhh thank you! :smile:

Do you have any predictions or resources? :tongue:
Original post by realsmilee
Ahhh thank you! :smile:

Do you have any predictions or resources? :tongue:


You're welcome :smile:
And I don't have any predictions, however there's a YouTube channel that I think is called Frances Dowle or something, which has videos where they basically make a huge mind map for each sub-topic within a unit - they can be quite helpful :smile:
This playlist of Youtube videos is good! https://www.youtube.com/watch?v=B5kTMbpZn6w&index=1&list=PLebF0BCGcZZ1T6l8dEiQlfeTuokxDscHW


Original post by realsmilee
Ahhh thank you! :smile:

Do you have any predictions or resources? :tongue:
Original post by rebbarn29


Thank you!
And Niamh too :u:

You guys will do great tomorrow! :wink:
Can someone please explain how genetic modification is used for making crops herbicide resistant.
Thank you! Good Luck tomorrow :smile:

Original post by realsmilee
Thank you!
And Niamh too :u:

You guys will do great tomorrow! :wink:
Original post by rebbarn29
Can someone please explain how genetic modification is used for making crops herbicide resistant.


-some plants have natural herbicide resistance
-you can cut out the gene responsible for this and transfer it to a useful plant
-this gene will then be reproduced in all of the plants cells
-the new plant will then be herbicide resistant

In incredibly basic terms
Original post by realsmilee
Thank you!
And Niamh too :u:

You guys will do great tomorrow! :wink:


Thank you, you will too :biggrin:
Original post by nurfgunlou
Does anyone have the mark scheme for the 2015 paper?


https://smhw-production.s3.amazonaws.com/uploads/attachment/file/3c9a0e1f1d74ecbed772cd898f17a933/A163-02_MS_June15.pdf
I teach P7 and have made a nuch of videos here here if anyone's interested. Most of P7 covered with more bits and pieces coming this week

https://www.youtube.com/playlist?list=PLN0ZlV7wJfDRyTFaFcFXHC7Gz1ZblMMyu
Original post by Alexandra00


Do you have the paper too?
Reply 153
Avatar for Jakir
Jakir
14
Sorry for being so late
A163-02-QP-Jun15.pdf546.9KB
Thanks

Original post by NiamhM1801
-some plants have natural herbicide resistance
-you can cut out the gene responsible for this and transfer it to a useful plant
-this gene will then be reproduced in all of the plants cells
-the new plant will then be herbicide resistant

In incredibly basic terms
I've just created an OCR 21st Century Science Biology B7 Unnoficial Mark Scheme, feel free to come and suggest and discuss answers. http://www.thestudentroom.co.uk/showthread.php?t=4176406&p=65942928#post65942928
When was most of B7 in that B7 exam?!
Original post by rebbarn29
When was most of B7 in that B7 exam?!


I know, there was a lot of questions on ideas about science.
I found it lemon de squeezy.


⚔🛡⚔~Nothing happens to anyone that he is not fitted by nature to bear - Maximus Decimus Meridius~⚔🛡⚔
Original post by Mr. Flibble
I teach P7 and have made a nuch of videos here here if anyone's interested. Most of P7 covered with more bits and pieces coming this week

https://www.youtube.com/playlist?list=PLN0ZlV7wJfDRyTFaFcFXHC7Gz1ZblMMyu


Thank you so much!!

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