B5.3 How do genes control growth and development within the cell? DNA is a nucleic acid in the shape of a double helix. Long strands of DNA make up chromosomes – these are found in the nucleus of a cell. DNA is a chemical code – our bodies need proteins for growth and...
B5.1 How do organisms develop Cells are the building blocks of all living things – multicellular organisms are made up of collections of cells. The cells can become specialised to do a particular job. Groups of specialised cells working together are called tissues and...
B5.2 How does an organism produce new cells? Mitosis and meiosis are two ways that cells reproduce MITOSIS is the process by which a cell divides to produce two new cells with identical sets of chromosomes to the parent cell – the new cells will also have all...