B3 Living and Growing
Mind Map of B3 Living and Growing.
- Created by: Mary
- Created on: 24-12-12 13:05
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- B3 - Living and Growing
- Molecules of Life
- Mitochondria
- - Respiration takes place in the mitochondria.
- is very small and cannot be seen using a school microscope.
- Ribosomes
- Ribosomes are too small to see using the light microscope.
- have alot of structures
- Found in the Cytoplasm.
- used in the cell when proteins are made.
- DNA
- Tightly coiled inside the nucleus.
- Forms structure called chromosomes.
- A section of a chromosome is called a gene.
- DNA is a code for making protein.
- Discovery of DNA.
- Watson and Crick discovered the structure of DNA in 1953.
- Repeated by other scientists to help make sure the results were valid.
- Erwin Chargaff discovered that there were equal numbers of A and T bases of C and G bases in DNA.
- Mitochondria
- Proteins and Mutations
- Collagen- This protein can be found in the walls of arteries. it makes the walls stronger.
- this can be found in bones, tendons and cartilage.
- Insulin - controls the blood sugar levels in the body.
- Haemoglobin - used to carry oxygen around the body
- Mutations
- sometimes a gene code can change.
- Can cause the shape of protein to change.
- Gene Mutaions cna be caused by : - Radiation
- Enzymes
- speed up reactions in body (biological catalysts)
- lock and key theory:
- substrate molecule fits into the active site
- Each enzyme can only work on a particular substrate.
- Collagen- This protein can be found in the walls of arteries. it makes the walls stronger.
- Molecules of Life
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