Eukaryotic cells

• The nucleus controls the cells activities by controlling transcription of

  DNA.
• The nucleolus makes ribosomes. The nucleoplasm is full of chromatin. The nuclear envelope is a double membrane with nuclear pores

  to allow movement of mRNA.
• Mitochondria produce ATP by aerobic respiration. There found in cells that require lot's of energy. The folds are called cristae. The internal space enclosed by the inner membrane is called the matrix.
• The RER is a series of interconnected flattened sacs that have ribosomes attached and appear as dark blobs.
• The RER is involved in folding and processing proteins (made by ribosomes).
• The SER is a tubular structure with spaces. It's involved in lipid synthesis and processing.
• The golgi body takes proteins (from RER and free ribosomes) and lipids (from SER) to process and package them. They bud off in vesicles. They're used in the cell or leave by exocytosis.
• Ribosomes are the site of protein synthesis. They translate mRNA into proteins.
• Centrioles are important for the accurate separation of chromosomes

  during cell division. They create spindle fibres.
• Lysosomes are spherical sacs containing digestive enzymes involved in the breakdown of invading cells or worn down parts of cells.
• Eukaryote have membrane bound organelle. They often have a specific function and are part of multicellular organism