Summary Biological membranes revision notes for Biology A level OCR
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Course
Biological membranes
Institution
OCR
Book
A Level Biology A for OCR Student Book
In depth revision notes covering the whole of biological membranes. The topic is broken down into the individual specification points, shown by the numbers used throughout.
Document with link to ANKI flashcards for OCR A Level Biology A, year 2
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Biology
Biological membranes
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, 2 1 5 BIOLOGICAL
. .
MEMBRANES
Roles of membranes
They separate the contents
·
of the cell from their
environment
the
↳
they also separate
organelles from each other
+
cytosol = compartmentalisation
[that allows the specific
This
g
Metabolism conditions required for
includes
& reactions (e g
car . .
chemical gradients) to
be maintained I
Proteins
·
have to be wi particular positions for
chemical reactions to take place
·
they act as barriers -
controlling what comes
wito , out of the cell
↳
they'reJ
partially permeable so only
certai molecules can pass through
·
invowed in the secretion of hormones/
druicals that signal other alls
They contain all receptors that
hormones/
·
# memicals can buid to Cels
alowning ,
to communicate with each other
I Cell signalling
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