Results are out! Find what you Get quick advice or join the chat

Unlock these great extras with your FREE membership

  • One-on-one advice about results day and Clearing
  • Free access to our personal statement wizard
  • Customise TSR to suit how you want to use it

Biotechnological Process of making Bt Cotton.

Announcements Posted on
Had your SQA results? Find your uni forum to get talking to other applicants, existing students and your future course-mates 04-08-2015
Competition: win a karting session for you and seven mates! 24-07-2015
  1. Offline

    Hello all,

    Can someone please either a) find me a link to a website or b) write a simple procedure of the process of how Bt (Bacillus Thuringiensis) Cotton is made.

    And why is Bt Cotton desirable to humans?

    Please DO help, with whatever knowledge you may have and Thanks a million in advance.

  2. Offline

  3. Offline

    Hmmm no kids for me to teach anything to yet and I'm all prepped after half term so let's see what I can remember...

    Bt is a toxic bacterium. If it makes it into an insect's gut then it produces a protein (known as Cry) which basically increases the porosity of the insect's intestines (i.e. the insect melts from the inside).
    Cotton is a plant that we like to grow that is regularly attacked by insects
    Bt cotton is cotton that has been transformed with the CRY gene from Bt, which allows it to manufacture this toxic compound.
    Because the cotton is then protecting itself we need to use far far less insecticide (cost effective) and only insects that eat the cotton are targetted, rather than all of the nice insects living in the field but not attacking the cotton.

    Now... as for how it gets in there.... IIRC cotton isn't recalcitrant so what they probably do is take the CRY gene out of the insect's DNA, make it into a plasmid, infect Agrobacterium tumefaciens with the plasmid, and then let it lose on some cotton. (Agrobacterium will naturally attack plants - it causes crown gall disease - and it incorporates its DNA into the plant, a bit like HIV).

    Of course, I could be wrong, in which case you'd take really fine gold pellets and basically soak them in DNA and then bombard the plant with them with a high speed gun. But that's expensive, so we don't like doing it
  4. Offline

    You're an absolute legend Bekaboo. That was exactly the kind of info I was trying to find.

    Thanks a million!


Submit reply


Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: June 2, 2009
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Uni students: did you know what you wanted to do when you left school/college?
Results and Clearing

SQA results chat

Come talk about your results here

new on tsr

Indian? Join the society here

Take part in the chat and make friends


Think you'll be in clearing or adjustment?

Hear direct from unis that want to talk to you

Get email alerts for university course places that match your subjects and grades. Just let us know what you're studying.

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.