1. This organelle is a network of membranes. One part has ribosomes. The function of this part is to store and transport proteins.

2. This organelle is filled with a watery substance. In plants it is very large. Its function is to store water, food and waste.

3. These organelles have a double membrane. Their function is to produce energy.

4. This organelle has no membrane. Its function is to produce proteins.

5. This organelle has a membrane. It is responsible for photosynthesis.

6. This organelle processes protein and lipids. It can also send packets of molecules out of the cell.,

• Cells are the smallest structural units of life that can function independently.
• Cells were first discovered in 1665 by Robert Hooke.

• Cell membrane. A thin layer that covers the entire cell which regulate the passing of substances into and out of the cell.
• Cytoplasm. A jelly-like substance inside the cell which has organelles with specialized functions.
• Genetic material. It consists primarily of DNA. It gives instructions to the cell which control its activities. 

• Genetic material floats freely throughout the cytoplasm.
• The large majority are single-celled organisms, such as bacteria.
• Prokaryotic cells generally contain a cell wall, ribosomes, genetic material and flagellum.
• In some bacteria, another layer, called a bacterial capsule, surrounds the cell wall.
• The flagellum is used for movement.

• Genetic material is located inside a nucleus.
• They are larger than prokaryotic cells.
• Eukaryotic cells generally contain a nucleus and organelles.
• Animal eukaryotic cells are different from plant eukaryotic cells.

• Animal cells usually have an irregular shape, as they do not have rigid wall.
• They have a nucleus in the centre.
• Some can move about using flagella or other mechanisms.

• Plant cells have a rigid cell wall that gives the cell a regular shape and protects it.
• They have a nucleus located on one side, due to the large size of the vacuole.
• They do not have the ability to move about freely.

• Ribosomes: produce proteins.
• Endoplasmic reticulum (ER): Rough ER stores and transport proteins. Smooth ER are involved in lipid production.
• Golgi apparatus: processes and packages proteins and lipids.
• Mitochondria: produce energy.
• Lysosomes: digest complex substances.
• Centrosomes: contribute to cell division and movement.
• Chloroplasts: responsible for photosynthesis.
• Vacuoles: store food, water and waste.