A Level Biology Revision "The Fluid-Mosaic Model of Membrane Structure"

You can find all my A Level Biology videos fully indexed at www.freesciencelessons.co.uk/...
In this video, we start looking at the structure of cell membranes. First we explore the structure of phospholipids and the phospholipid bilayer. We then explore the role of cholesterol in membranes. Finally, we look at what is meant by the fluid-mosaic model of membrane structure.
This video is aimed at the UK A Level Biology specifications. Students studying International A Level Biology will need to check their specification.
Image credits:
Cholesterol
upload.wikimedia.org/wikipedi...
BorisTM, Public domain, via Wikimedia Commons

[@gddanielk8491]

Thanks for doing all these a level vids in time for me starting y12

[@lauren51]

How did you do?

[@gopeshpatel-hellyer8284]

actual goat

[@catcatcat2899]

Thank you so much!!! I find your videos so incredibly helpful.

[@milanacs1916]

Amazing video sir I’m glad that you are making a level videos

[@imma_eatjin]

will you be covering the cell structure and transport across the cell membrane topics?

[@coriolis4761]

Hello.
Please could you do a video on slide/specimen preparation in Microscopy?

[@sarajogai9351]

thanks so much for doing these vids. will you be covering component 2 as well?

[@sarajogai9351]

Hi, i understand that the hydrophobic molecules can pass through the surface membrane because the center of the phospholipid bilayer is hydrophobic, but how come the hydrophobic molecules aren’t stopped by the hydrophilic phosphate heads?

[@missagyemang9407]

So helpful

[@MutaSianga]

Please share one on biological molecules simple way..

[@safiulfaiyaz7038]

What is the significance of reducing the movement of water soluble chemicals across the cell surface membrane by the cholesterols?
Do they harm the cell by disrupting the formation of the polar heads? Or perhaps they mess with the fluidity and the structural integrity of the membrane by messing with the charges or the bonds?
Thanks in advance
Cheers

[@Emily-dn3jo]

I love you

[@gurru526]

same

[@MH-yt7vm]

Hi sir, I just wanted to ask that for the role of DNA polymerase in DNA replication, do we need to know about 3' and 5' (3 prime and 5 prime)?

[@Freesciencelessons]

Yes you do. I cover it in my videos on DNA replication.

[@xinyu9036]

Span : covers and extend across

[@MH-yt7vm]

Sir, what does polar and non polar mean?

[@Freesciencelessons]

Hi. A polar molecule is one with a charge and a non-polar molecule has no charge. I cover those ideas in the topics in Biological Molecules. Hope that helps.

[@waheedabi6340]

Hello sir
Thankyou so much for making this video it really helped me when it came to revising for my exams
I have a question i would be reallly greatful if you could help me with answering it
Suggest two ways tubulin is essential to protein synthesis and protein secretion in eukaryotic cells
Thankyou
so much i really appreciate it

[@yourlittlesciencecafe]

Sheldon Cooper appears in my head when I see sir 😂😅 They look quite alike lol

[@Dawgclipzzzz]

Certified boyo

[@coblito765]

Sir voice is same like ,big bang theory sheldon ☺️

[@naomiemorton5056]

;)

[@altf4938]

W