A2 Biology - ADH mechanism (OCR A Chapter 15.6)

[@adelaide4356]

You're an absolute gem!! Thank you so much 🤸‍♀️🐥

[@BioRach]

Haha glad you find it helpful! Thanks for watching :D

[@aysha64]

Wow just wow my book is more confusing thank you miss love your explanations...and drawings also

[@mahbadabdulla7711]

Also, could you go into detail about the controlling bioreactors because I think the information on topic 22.7 about it is too little

[@isabelokeke6255]

could you do videos on describing and explaining important practicals

[@BioRach]

It's been added on my list! Thanks for the suggestion and thanks for watching :)

[@isabelokeke6255]

BioRach I really love your videos, they are so helpful thanks x

[@BioRach]

@@isabelokeke6255 haha thank you! I'm really glad to know you find them helpful :) Good luck with your revision!

[@ghsjgsjg53chjdkhjydhdkhfmh74]

Same thank you!

[@jiya-jn6bb]

Could you do a video on kidney failure ? These videos are rly helpful, tysm

[@mahbadabdulla7711]

Please could you do topic 22.7 on culturing microorganisms. I don’t understand the metabolites and how it links with the figure 1 on page 260

[@BioRach]

Ok, this is on the list of topics to do soon! But for now... Primary metabolites (PM) are substances produced as an essential part of normal functioning (eg. amino acids, ethanol). So in humans, our PM are for example carbon dioxide and urea. As PM are produced as part of normal essential metabolism, the microorganisms will produce them since the beginning, as they are growing through respiration etc.. They aren't drawn on figure 1 on that page, but they will have roughly the same shape as the 'biomass' graph. Secondary metabolites (SM) are the opposite - substances produced which are not essential to normal functioning, but can still be used by the (micro)organism. For example, normally the fungus Penicillium won't produce penicllin (as it doesn't need it to survive nor produce it to aid survival), but when there are other bacteria in the same environment, it will produce and release the chemical to kill those surrounding microorganisms. As SM are not essential to survival, the microorganisms will ONLY produce them when they have materials to spare and/or there is a need to do so in response to the environment (eg. bacteria presence). Therefore, SM won't be made since the beginning (there was no need), but later on when there is slight competition in the stationary phase. Hope this helps :)

[@ghsjgsjg53chjdkhjydhdkhfmh74]

@@BioRach thank you!😍

[@eimansalman1935]

Perfect really perfect best of luck dear💜💜

[@BioRach]

Haha glad you find it helpful :) thanks for watching!

[@poembob8020]

6b+

[@jimidiaz-wright4723]

You’re a boyo truth