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  • Created by: Hannah
  • Created on: 08-06-13 18:35
What are the three types of Biofuels, and where do they come from?
Wood, biogas and bioethanol. Trees, decomposition of dead matter, fermentation of sugars
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What does biogas contain?
Methane, some CO2, and traces of hydrogen; nitrogen and hydrogen
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What is biogas and where can it be made?
A flammable gas made by aerobic respiration. Sludge digestor, Septic tank, and Biogas digestor tank
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What is the process of making biogas?
Faeces/ food leftovers/ dying matter are fed into a a biodigestor where microbes sit. The microbes (when in anaerobic respiration) reproduce quickly with the matter creating biogas.
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Uses of biogas?
Cooking, electricity, and travel
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What are the reasons for and against Gasohol?
FOR: 70% Reduction of C emissions; by-product is perfect for feeding cattle, and slows global warming. AGAINST: Land could be used for food; same energy to produce it; ethanol decays in pipes and it needs transporting.
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What is the equation for fermentation?
carbohydrates -> alcohol + carbon dioxide
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What does the term 'lactose intolerant' mean?
cannot product lactose, cannot digest lactose based food therefore resulting is diarrhoea
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What is the use of an immobilized enzyme?
lactose -> glucose + galactose. Can use it again and again.
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How do Biological Washing Powders work, and what are the needs for Biological Washing Powders?
Temperature has to be between 30 and 40 degrees. They remove stains easily because they're all biological components. They're good for the environment because less temperature is needed.
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What is the equation for low calorie foods? How does it result in less calories? What is the enzyme used?
sucrose -> glucose + fructose. Fructose is sweeter than sucrose, so less sugar needs to be added. The enzyme used in sucrase or invertase.
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What are the steps in making Yoghurt?
1. Sterilize equipment 2. Pasturise milk 3. Add lactobocillus and incubate the culture 4. Sample 5. Add flavorings and packaging
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What is the equation for lactic acid?
Lactose -> Lactic acid
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What colours represent bacterial activity in milk and sugar?
No bacteria activity: Blue -> Lilac -> Mauve -> Pink -> Colorless :High Bacterial Activity
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What happens in Brewing? What is its equation?
The yeast reproduces asexually called budding. In the right conditions it then begins to anaerobically respire. C6H2O6 -> 2C2H5OH + 2CO2
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How is Beer made?
Barley grains are soaked to remove the sugar. Hops are added for flavoring. Yeast is added to the mixture. The mixture ferments and beer is made.
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How is wine made?
Grape juice, sugar, yeast and water. Bubble trap. Cleaning agent. Pasturised.
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How is vodka made?
Fermentation of potato, evaporated, and condensed.
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What is the structure of a bacterium?
Cell wall: maintains shape, and keeps it from bursting. Flagellum: tail, allows movement. DNA: Controls cells. Cell surface membrane
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Which shapes of bacteria belong to diseases?
Spherical: MRSA. Rod: Anthrax. Curved rod: Cholera. Spiral: Syphillis
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What are the different types of bacteria and what do they feed on?
Chemosynthetic bacteria: inorganic chemicals as energy source. Photosynthetic bacteria: use light as energy source. Pathogenic bacteria: use living organisms. Decomposing bacteria: use dead organic matter.
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What are extremophiles?
Bacteria which can live in incredibly extreme conditions
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What is binary fission?
Bacteria double every 20 minutes in normal temperature, but every hour in refrigerated conditions.
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What makes up soil?
Humus, clay, silt, stones, sand
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Card 2


What does biogas contain?


Methane, some CO2, and traces of hydrogen; nitrogen and hydrogen

Card 3


What is biogas and where can it be made?


Preview of the front of card 3

Card 4


What is the process of making biogas?


Preview of the front of card 4

Card 5


Uses of biogas?


Preview of the front of card 5
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