TRIGLYCERIDE and PHOSPHOLIPID structure and function for A-level Biology. Includes EMULSION test.

[@stevejones3662]

Excellent. An Emulsion is a mixture of chemicals that do not mix; you make them mix by the input of extra energy.

[@lvithan]

About to take some exams that will determine my UCAS predicted grades. I'm a D grade student in exams and need somewhere close to Bs in order to do the course I'd love to do. So with a week left until these exams I have finally decided to actually start from the beginning and actively review each topic instead of procrastinating until the day before. Thank you so much for these videos xx

[@bobbobby3085]

Good luck I hope you achieve the grades you need

[@tayyabanawaz3479]

Hi miss. Do we have to understand how truglycerides are oxidised, i dont understand how oxidising triglycerides would release water when they only have an O in the ester bond. Is the term just reffering to when they release wtaet in condensation. Thanks

[@N1ght5ky]

You’ve helped me a ton with consolidation ❤️

[@MissEstruchBiology]

ahh yay so pleased to have helped

[@wannabibay7113]

Hi Miss Estruch!♥ Do you have notes about the properties of Phospholipids? Thank you very much♥

[@MissEstruchBiology]

Hello, I don't have notes completed just yet, but I am in the process of making all my PowerPoints and A-level notes available on my website.

[@sofiaabdolvand2477]

@@MissEstruchBiology hi tank u for everything Could you tell me how I find you PowerPoint?? Is is very helpful for IMAT exam?

[@MissEstruchBiology]

hello, you can get them at missestruch.co.uk I'm not familiar with the IMAT. I'd recommend comparing it to to AQA specification to see how similar it is ☺

[@yorkshirediwali11]

Hi Your lectures are very good. but a small correction - ester bond is -COO-, not _COOC-.

[@justsomeone2001]

Thank you! Just a small question, at 8:03, “have two charged regions”, which two charges are you talking about? Please help!

[@fatihaah]

Hey, I hope this isn’t 2 late(it is) but the 2 differently charged regions are the phosphate heads and fatty acid tails

[@johnysharki5694]

​@@fatihaahbut didn't she already say that the fatty acid chain is uncharged?

[@uh09]

​@@johnysharki5694fatty acids are hydrophobic (no charge) but phosphate is hydrophilic (negative charge), so they are polar

[@jasonsingh9698]

Hi Miss, do we have to remember the structures of glycerol and fatty acids? Because how would we describe where the water molecule is removed to produce the ester bond through a condensation reaction. Thank you

[@MissEstruchBiology]

no, not the entire molecule. Just that fatty acids have a carboxyl group and hydrocarbon chain...For glycerol, you only need to know it had a hydroxyl group, involved in the condensation reaction

[@jasonsingh9698]

@@MissEstruchBiology okay that makes sense. Thank you so much for your help

[@AroundtheWorld-k9c]

Hello miss,IF YOU DON’T MIND COULD YOU PLEASE UPLOAD THE SLIDES YOU ARE USING

[@MissEstruchBiology]

Hey, you can get them all at missestruch.co.uk

[@mohid0786]

Hey, You know at 1:11, are the three middle dos in the fatty acid supposed to represent a double bond?

[@mohid0786]

Wait, not double bonds. I meant like the 3 dots, are they supposed to represent the other number of carbon & hydrogen bonds left out to simplyfy the idea? As each fatty acid has a different number of carbon & hydrogen bonds

[@MissEstruchBiology]

Hello, great question. The three dots represent that there are many additional hydrocarbons in the chain that have not been drawn to simplify the diagram. Hope that helps

[@mohid0786]

@@MissEstruchBiology Your videos are very helpful, I learned loads more in a couple of hours than 3 months of biology

[@jasonsingh9698]

Hi Miss, why do we need that phospholipid bilayer. I know it makes it difficult for water-soluble substances to pass through. What sorts of molecules/ ions are water- soluble substances?

[@jasonsingh9698]

Do we not want watery substances entering cells due to it affecting water potential and causing osmosis to occur, potentially causing the cell to burst?

[@alexslaven3071]

@jasonsingh9698 Im not a teacher so dont quote me on this but I think that we dont want water soluble substances as it causes cells to burst and become turgid - this is not a good thing

[@MIshaq-df9by]

Hello Miss, How do triglycerides release water when oxidised?

[@akosua.baidoo]

yes 3:54

[@EternalShadow1667]

I don’t think you need to know, at least, not for UK A levels (I think).

[@rozhina304]

Thanks for your helpful video. How triglycerides release water molecules? Don't they need water to oxidized? Could you please explain it?🤍

[@WalaAbdelhalim-fc2gk]

they need oxygen because if something has been oxidized it means it gained oxygen.

[@Odonta7]

What force or reaction is holding the two or more phospholipid molecules together?

[@MissEstruchBiology]

It's due to the hydrophobic and hydrophilic regions of the phospholipids repelling/interacting with water

[@Addictedtoapex]

Thank you for all your video. It is very helpful for me to revise

[@MissEstruchBiology]

You're so welcome, glad it's helping with your revision 😊

[@treishamathi9429]

what exam board do you base you videos on?

[@MissEstruchBiology]

They are AQA based.

[@shafinbepary2000]

really good video !

[@MissEstruchBiology]

thank you!!!

[@Tolu_xht]

Why do lipids have low mass?!

[@jexter0]

Im guessing its about the structure and the formation

[@jenelaimepasdutout4653]

They are insoluble to water therefore they don’t become turgid by water passing through them and increasing the water mass of the lipids overall

[@KingslinaOboh]

Hi,because they are composed of relatively light elements😊 I see you asked this question two yrs ago,and I'm replying two years later,i hope you did well in your a levels 😊❤

[@miketyson-g6b]

Thank you

[@MissEstruchBiology]

You're welcome

[@alexslaven3071]

This has me so confused ngl

[@haabeel7702]

cheers

[@ameliaguerges6644]

This video is confusing