AS Biology - Nucleotide structure (OCR A Chapter 3.8)

[@emilyrichardson1396]

Thank you for this video? Do you think you will be posting more regularly again?

[@BioRach]

I hope so!

[@Yosteredits]

thankyou so much for these vids they are very helpful and i was wondering if you are going to do walkthrough papers since th ey would be really helpful if not thats fine

[@BioRach]

Thanks for watching :) My current plan is that I will not do walkthroughs of exam papers because of copyright issues. Quite a few KZbinr teachers are getting into trouble for that as well, which is not ideal. Sorry about that!

[@olliecole7163]

Hey, thanks very much, have you done a video on ATP & ADP?

[@BioRach]

No I don't think so - thanks for the suggestion!

[@bradysmudge]

thanks

[@Mk.1120]

Part 2?

[@jamesdhanraj3048]

Man like🤠🤠☝️☝️☝️

[@sobiasuleman4411]

is it not po4 2- and not 3-

[@BioRach]

Phosphate is 3-. I think 2- would be phosphoryl group?

[@sobiasuleman4411]

@@BioRach sorry, i think its a mistake in my textbook, it says phosphate group, -po4 2-, an inorganic molecule that is acidic and negatively charged. Is that not referring to the phosphate group in the nucleotide?

[@samantha101rachsamantha7]

@@sobiasuleman4411 it's PO4 3-

[@harryroberts8511]

When the phosphate group is bonded to the sugar of a nucleotide it does so via a single covalent bond from one of the oxygen atoms, meaning that the additional electron that gave it a 1- charge is not required anymore (to complete oxygen's octet) so it becomes 2-. Likewise when forming a polynucleotide another 1- charge is lost due to another oxygen bonding to another sugar.