B3 Living and Growing
- Created by: Mary
- Created on: 12-01-13 12:39
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- B3 - IMPORTANT!
- KEY WORDS:
- Mitochondria - Where respiration takes place
- Ribosome - Where protein synthesis takes place
- Nucleus - Contains DNA
- Cytoplasm - Jelly like ... where reactions take place
- Cell Membrane - Controls what leaves and enters the cell
- Vacole - Stores water and nutrients
- Chloroplast - site of Photosynthesis
- glucose + oxygen -> carbon dioxide + water
- Biological catalysts - Enzymes speed up reactions in the body.
- Mitosis - Produces new cells for growth
- Miosis - type of cell division
- Arteries - transport blood away from the heart
- Veins - Transport blood back to the heart
- Capillaries - links arteries to veins
- Haemoglobin - chemical found in red blood cell which carries oxygen
- Selective Breeding - breeding two to get desired characteristics
- Alleles - characteristics carried as pairs of chromosomes
- Insulin - controls glucose levels in body
- Tissue Culture - small sections of tissue to clone plants
- Genetic Engineering - Transfer of genes from one organism to another.
- Watson and crick discovered the structure of the DNA.
- Four bases in DNA A-T C-G .... called complementry bases.
- Cross links hold two strands together.
- section of chromosome made of DNA.
- Proteins are made in cytoplasm.
- Liver or muscle cells have large numbers of mitochondria.
- proteins are made of amino acids joined together.
- substrate molecule fits into the active site.
- enzymes work best at a particular temperature and pH.
- Mutation changes the order of the bases.
- Food energy is trapped in a molecule called ATP.
- Anaerobic Respiration - glucose ->lactic acid (+energy)
- Disadvantage:- Lactic acid builds up in muscles causing pain and fatigue.
- Breathing rate and heart rate stay high during recovery.
- Mitosis - genetically identical
- Before the cells divide DNA replication must take place.
- Meiosis - two divisions.
- stem cells stay undifferentiated
- dry mass is the best measure of growth.
- measuring wet mass is hard for some organisms.
- bacterial cells do not have a true nucleus.
- KEY WORDS:
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