AS OCR Biology Unit 1 Module 1 Cell Organelles

- Contains nearly all of the cells genetic material

- Controls the cell's activities

Rough ER
- has ribosomes
- transports proteins that were made on the attached ribosomes

Smooth ER
- does not have ribosomes
- makes lipids that the cell needs

- Receives proteins from the ER and modifies them

- May add sugar molecules to them

- It then packages the modified proteins into vesicles that can be transported

- Some modified proteins may go to the surface of the cell so that they can be secreted

- The site where ATP energy (adenosine triphosphate)

- The site of photosynthesis in plant cells

- Contains powerful digestive enzymes

- To break down materials

- For e.g: White blood cell lysosomes help to break down invading microorganisms

- Site of protein synthesis in the cell (where new proteins are made)

- Take part in cell division

- Form fibres, known as spindle which move chromosomes during nuclear division