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IGCSE Year10 Chapter 2 (organisation and maintenance of the organism)

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The notes were written according to the Cambridge IGCSE Biology textbook. Additional explanation was added for further understanding.

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Organisation and maintenance of the organism
CELL STRUCTURE & ORGANISATION
• Cell ( basic unit )
• Photomicrographs
• Longitudinal section & tranverse section




Plant cell and animal cell structure

, Non - organelle




Organelle (cellular structure that performs specific functions within a cell)
Endoplasmic Recticulum (ER)


– Rough Endoplasmic Recticulum:
• Transporting the newly synthesised protein.
• Provides surface for chemical reaction


– Smooth Endoplasmic Reticulum:
• Synthesising lipids and other non-protein substances.
• (steroids & phospholipids)
• Detoxification of drugs and metabolic by-products


Ribosomes
• Site for synthesising protein.




Mitochondrion *(prokaryote x)
• Produces ATP (Adenosine triphosphate.)
• Site of energy production through cellular respiration.
• Release energy through oxidation of food
• Energy released in the form of ATP
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