Cells

• Prokaryotic cells do not have a nucleus.
• Eukaryotic cells have a nucleus.
• The function of the cell membrane is to control what enters/exits the cell.
• The function of the nucleus is to control the cell's activities and to contain DNA.
• The function of the mitochondria is respiration.
• The function of ribosomes is to synthesise proteins.
• Plant cells have all animal cell structures but also chloroplasts, a vacuole and a cell wall.
• Electron microscopes have a higher magnification and resolution than light microscopes.
• Cell walls are made from cellulose.
• Magnification = image size / actual size
• Stem cells are undifferentiated cells.
• Stem cells can be used to treat paralysis or diabetes.
• Stem cells in animals can be obtained from embryos or bone marrow.
• Stem cells in plants can be obtained from the meristem.