Organelles and their functions - basic description

Functions of organelles and brief descriptions.


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  • Created by: Joanna S
  • Created on: 17-09-13 21:26
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Organelle Function
Nucleus The nucleus is the brain of the cell function like
an administration centre. It's used to control the
food intake, movement and reproduction within
the cell. The nucleus is always aware of what is
going on inside the cell. It also stores DNA.
Usually there is only one nucleus per cell and
only eukaryotes have them.
Nucleolus It is found within the nucleus where each nucleus
can contain up to four nucleoli depending on the
species. It's used to make ribosomes, which
allows protein synthesis within the cell.
Nuclear envelope It's a two-layered membrane which encloses the
nucleus keeping its contents inside. It has nuclear
pores to allow passage of molecules between
the nucleus and the membrane
Endoplasmic reticulum It's a network of flat sacs acting as a further pipe
between the nucleus and the cytoplasm also
filtrating the molecules that enter/exit. The
rough part of ER is covered in ribosomes and is
involved in production and processing of
protein. The smooth part of ER doesn't have any
ribosomes and there is usually less of it. It's
commonly involved in production of lipids also

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muscle cells it's involved in calcium storage.
Golgi apparatus It's found in both, plant and animal cells. Each
one has 5-8 membrane covered sacs residing
close to the nucleus. Its main function is the
shipment of cell's chemical products. The Golgi
apparatus modifies protein/lipids built in the ER
and prepares them for export around the
cell/outside it.
Ribosome Ribosomes are attached to the rough part of the
ER and are the main site of protein synthesis.…read more

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