1.1. Gathered information on the sequence of changes in the nucleus of plant cells undergoing mitosis.
1.2. Observed a prepared slide of root tip using the compound light microscope.
1.3. Modelled stages to compare the processes.
2. DNA Replication
2.1. The structure of DNA allows the molecule to replicate itself exactly.
2.2. Responsible for the transmission of genes.
2.3. DNA copies itself by 'unzipping' the bonds and as the strands separate, free nucleotides floating in the nucleus of the cell are able to join on to the exposed bases.
2.4. Process builds a new strand on each of the unzipped strands, forming two replicas of the original DNA.
3. Importance of Exact Replication
3.1. Mitosis and meiosis needs to be accurate and correct functioning needs to be ensure so a mutation does not occur.
3.2. Spontaneous mutations are natural errors that arise at random during DNA replication
3.3. Mutagenic mutation arises as a result of exposure of cells to environmental factors such as radiation or chemicals.
3.4. DNA polymerase I recognises mismatched pairs and replaces with correct pair.
3.5. Genetic continuity is a way of preserving genetic information across generations.
4. Mitosis
4.1. Type of cell division that results in the formation of identical cells.
4.2. Results in growth of an organism, is involved in the healing of wounds, and the replacement of cells.
4.3. Occurs most frequently in areas of rapid growth in organisms.
