Jun 22, 2008
BIOLOGY UMPTN Test 1994-1996
at this post we brief little give tutorial about cell structure, why because in 1995 until now cell always have the own number at UMPTN or SPMB test sheet,
see and learn carefully biological cell structure below
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here we explain some parts of cell thats are
Golgi Apparatus
Structure
- stacks of flattened sacs of unit membrane (cisternae)
- vesicles pinch off the edges
Function
- modifies chemicals to make them functional
- secretes chemicals in tiny vesicles
- stores chemicals
- may produce endoplasmic reticulum
Ribosome
Structure
- non-membraneous, spherical bodies composed ofv RNA (ribonucleic acid) and protein enzymes
Function
- site of protein synthesis
Mitochondrion
Structure
- composed of modified double unit membrane (protein, lipid)
- inner membrane in folded to form cristae
Function
- site of cellular respiration ie. the release of chemical energy from food
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