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Nucleus
Nucleolus
Manufactures ribosomal DNA and assembles
ribosomes
Nucleoplasm
Chromatin
Hereditary material that forms chromosomes
during cell division
Nuclear Envelope
Double membrane surrounding the nucleolous
Nuclear Pores
Holes in the nuclear envelope to allow for
exchange of materials
Ribosomes
Site of protein synthesis…read more

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Mitochondria
Folded Inner Membrane
Smooth Outer Membrane
Cristae
Some enzyme action occurs on the surface
Fluid Matrix
Site of Respiration
Mitochondria are responsible for the
production of ATP
Cells with high metabolic activity have more
and bigger mitochondria with more cristae…read more

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Rough Endoplasmic Reticulum
Extends from the ribosomes on the nuclear
envelope to provide a transport system throughout
the cell for newly synthesised proteins
Covered with ribosomes
Flattened sacs are known as lamella.
Smooth Endoplasmic Reticulum
Extends from the RER to provide a transport system throughout the cell for lipids
More tubular than RER
Has no ribosomes…read more

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Golgi Apparatus/Golgi Body
Cisternae
A flattened membrane bound sac
Vesicle
Small round hollow structure that transports
materials to and from the Golgi
Functions:
Modifies and packages proteins and lipids produced in the endoplasmic reticulum for
exportation
Adds carbohydrates to proteins to form glycoproteins
Forms lysosomes
Cells that secrete more substances have more Golgi…read more

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Lysosomes
Contain digestive enzymes (acid hydrolases) to break down:
· Old organelles
· Bacteria/debris inside the cell
· The entire cell when damaged or diseased
They contain the digestive enzymes so that they don't
break down materials that they shouldn't
They also release enzymes from the cell to break down
other cells
Common in secretory cells…read more

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