Organelles

• Size: 10-25 micrometres.
• Chromosomes are organised in chromatin form.
• Densley packed chromatin is called hetrochromatin.
• Less densley packed chromatin is called euchromatin.
• Is the 'control centre' of the cell
• Codes for protein synthesis.

• Size: 1-3 micrometres
• Appears darker than the nucleus
• Codes for ribosomal RNA (rRNA) - which makes ribosomes that are later transported to the cytoplasm.

• Size: 30 nanometers
• Visible only as black dots
• Either attach to the endoplasmic reticulum or are 'free' in the cytoplasm
• Consists of protein and rRNA
• Occur in groups called polyribosomes
• MANUFACTURE PROTEINS

• Rough ER

Have ribosomes attached and is responsible for the manufacture of proteins.

• Smooth ER

Does not have ribosomes and is responsible for the manufacture of lipids. It also detoxifies drugs and poisons and regulates carbohydrate metabolism.

• Size: 0.5 micrometers
• Are formed by the golgi apparatus
• Contain hydrolytic enzymes
• Aids in the destruction of worn out organelles
• Play a part in phagocytosis

• Is a series of curved, flattened sacs (cisternae)
• Responsible for the modification of proteins by:

1) Adding carbohydrates

2) Adding lipids

3) Adding prosethic groups

• Has a double membrane
• Is the 'power house' of the cell and produces energy in the form of ATP

• Are hollow cylinders made from protein tubulin
• Form the cytoskeleton
• Form spindle fibres
• Form centrioles