Biological washing powders are very effective at removing stains from organic molecules, such as blood or oil.
State the substance that makes biological washing powders so effective at removing these stains.
Give two advantages of using biological washing powders to remove stains over non-biological washing powders.
Complete the following paragraph on the use of yeast in bread making.
Yeast will respire _______________________ in the presence of plenty of ______________________. This will produce ____________________ gas which is trapped in the dough, causing the bread to ____________.
Yeast is also involved in the production of biofuels.
State the substance produced by yeast that is used as a biofuel.
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