Nucleus: Largest organelle. The nucleus controls DNA (Deoxyribonucleic acid ) and controls all cell activities. The nucleus contains a double membrane,

Nucleolus: The nucleolus controls the synthesis of RNA and other components. The nucleolus is needed to build ribosomes. This organelle is located in the Nucleus.

Nuclear Pores: These pores allow mRNA and rRNA to be actively transported out of the nucleus, and nuclear proteins to be transported in.

Plasma Membrane: Controls the entry and exit of materials

Cytoplasm: Contains cell organelles. The cytoplasm is also the site of chemical reactions within a cell.

Ribosome: Site of protein synthesis (Translation)

Rough Endoplasmic Reticulum (RER): This organelle has ribosomes attached to the surface. The organelle is the place where proteins are modified and transported. This organelle is membrane bound.

Smooth Endoplasmic Reticulum: No ribosomes on the surface, unlike RER. This organelle synthesises lipids and steroids.

Golgi Apparatus: A tightly packed group of flattened fluid-filled sacs. The Golgi Apparatus processes and packages complex molecules ready for discharge from the cell. This organelle is bound by a membrane.

Mitochondrion: A large organelle; is the site of aerobic respiration which makes ATP. The mitochondrion has a double membrane, the outer smooth, the inner folded to give a large surface area.

Lysosomes: Contain digestive enzymes which break down worn out cell structures and foreign particles by phagocytosis.

Vacule: Stores materials that may stay in the cell or be released. The Vacule is membrane bound.

Centrioles: Centrioles are close to the nucleus. They are in the centre of the centrosome or microtubule organising centre (MTOC). They duplicate just before cell division and form the basis of the spindle

Secretory Vesicle: Vesicle fuses with the plasma membrane, releasing materials to be secreted from the cell.

	Created by Reece Thompson almost 7 years ago

Highers Biology Note on Organelles and their Functions , created by Reece Thompson on 22/01/2018.