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BIOLOGY form 4 chapter 2

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BIOLOGY form 4 chapter 2
Non organelle

b) Non organelle
Characteristics
Functions
1. Plasma/cell membrane
-made of_________ & phospholipids
-________ permeable
-it regulates the_______of substances_____and out of the cytoplasm
2. Cell wall
(Plant cell)
-made of _________.
- _______ to all fluids
-gives _____ to plant
-provides mechanical ________ for the plant cell
3. Cytoplasm
-jelly-like matrix
-medium which organelles are _______.
-contains organic and inorganic substances
-medium for _______ reactions in the cell.

2.1 UNDERSTANDING CELL STRUCTURE AND FUNCTION
Cell Structure : Organelle
a) Organelle
Characteristics
Function
1. Nucleus
-the largest organelle
-has _______ thread
-control all _______ of the cell
-contain _______ which determine the characteristics and cell functions.
2. Vacoule
(plant cell)
-fluid filled sac enclosed by membrane called tonoplast.
-the fluid is called __________.
-vacoule in plants store chemicals such as water,________, ________, mineral, _________.
-vacoule regulate _________ in plant cell and paramecium
-supports ___________ plants
3. Mitochondrion
-cylindrical shape
-made up of ________ membrane units
-the site of _________ production through cellular respiration.
Glucose + O2 Energy + H2O + CO2
-energy released is used for cellular _______.
4. Lysosomes
(animal cell)
-contain hydrolytic ______.
-membrane-bound sac
-release enzyme to _______ material in food vacuoles in organisms like Paramecium
-break down complex organic molecules (eg protein, lipid, polysaccharides & nucleic acid).
-digest _____, dead or damage _______ to enable a cell to renew itself
5. Chloroplast
(plant cell)
-lens-shaped
-contains __________.
-traps _______ (energy) during photosynthesis
6. Centriole
(animal cell)
-small cylindrical structure
-form spindle fibres during cell ______ in animal cells
7. Ribosome
-small spherical organelles
-either attached to RER or free
-the site of _______

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