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AQA A-level biology cell organelles structure and functions continued -…
AQA A-level biology cell organelles structure and functions continued
chloroplasts
flattened organelle found in plant and algae cells
x2 membrane
contains thykaloid membranes
they stack up forming grana
lamellae links up grana
the site where photosynthesis occurs
some takes place in the grana, others the stroma
golgi vesicle
fluid-filled sacs
produced by golgi apparatus
the function is storing lipids and proteins
transports molecules made by apparatus out the cell
golgi apparatus
multiple fluid-filled sacs grouped together
noticeable is vesicles on the edge of sacs
processing centre for proteins/lipids
can make lysosomes
RER/SER
RER is multiple membranes filling fluid space
smothered in ribosomes
folding and processing ribosome made proteins
SER is very similar but no ribosomes present
it synthesises proteins and lipids made