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Biology Organism Features, Types of organism, Types of Organism, enzymes,…
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Types of organism
Animals
Multicellular organisms that do not have cell walls and obtain energy through eating instead of respiration
Plants
Multicellular organisms that have a cell wall, vacuoles, chloroplasts and obtain their energy through photosynthesis
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Types of Organism
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Animals, multicellular organisms that do not have a cell wall and don't photosynthesise, and they can mov from one place to another as well as having a nervous system
Protoctists, single celled organisms that do have features that are similar to anything.
Bacteria, single celled organisms that do not have nuclei and feed off dead organisms
Viruses, pathogenic organisms that have no cell structure and reproduce inside other living cells, they are very small
Fungi, Organisms that can be single or multicellular, they do not photosynthesise and instead secrete enzymes oto their food before ingesting the nutrients.
enzymes
enzymes are biological catalysts that speed up reactions by lowering the activation energy, they bind to the reactant to the active site, specialised, and then they break it down or connect into product
Too low temperature and the molecules have less kinetic energy so they collide less and they work less efficiently
Too high temperature and the atoms start to move, denaturing the active site and stopping it from working
Too far from the optimum pH and the bonds between the atoms in enzyme start to break, denaturing the active site.
The test for glucose is benedict solution, add it and if it is
The test for protein is biuret solution, add it and if it is purple, then it is positive
The test for starch is iodine, add it and if it is brick red then it is positive
The test for lipids is adding an ethanol solution with water and heat, if red layer on top then positive.
You coul change the temperature and pH for maltose and maltase and then check how much glucose is made with benedict's solution
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Movement
Osmosis is the net movement of water from a hgih water potential to a low water potential across a semi-permneable membrane
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Diffusion is the net movement of particles from an are of high concentration to an area of low concentration