Animal Cell:
Cell (Plasma) Membrane:

consists of a double layered sheet of phospholipid molecules interspersed with proteins.
Separates the cell from the outside environment
gives physical protection
allows import and export of selected chemicals

Nucleus:

Mitochondria:

consists of a double membrane surrounding a semi fluid matrix
The inner membrane is folded inwards to form projections called cristae. Inside this is the matrix
This cristae and matrix contain enzymes which enable this organelle to carry out aerobic respiration
During respiration, ATP is produced, which is used to provide energy for the cells' reactions. Most of the ATP is produced on the inner mitochondrial membrane. It is highly folded so there is maximum surface area available.

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GCSE Biology (Cell Structure) Notiz am Untitled, erstellt von Shana am 17/06/2013.