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Cell Structure
GCSE Biology
8
Biology
Not Applicable
05/26/2007

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Term
Mitochondria
Definition
Seed like structures found in the cytoplasm. These are the site of aerobic respiration (i.e. oxygen is used and energy is released here).
Term
Nucleus
Definition
Structure in a cell which is responsible for controlling cell activity. It contains chromosomes, which carry genes. Therefore, it also manages cell division.
Term
Cell Membrane
Definition
A barrier which separates the contents of the cell with the outside of the cell. It controls the movement of substances into and out of the cell.
Term
Cell Wall
Definition
Found in plants, this is made up of cellulose and is very rigid. It gives strength to the cell and is permeable.
Term
Ribosomes
Definition
Found in the cytoplasm and the endoplasmic reticulum, these are small structures which assemble proteins.
Term
Cytoplasm
Definition
Jelly like liquid which fills up the space in a cell. All chemical reactions take place in the cytoplasm.
Term
Permanent Vacuole
Definition
Contains cell sap and helps to maintain turgor pressure against the cell wall.
Term
Chloroplasts
Definition
Disk shaped structures found in the cytoplasm which conduct photosynthesis. They contain a green pigment called chlorophyll which absorbs light energy (required to make sugars).
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