Working with wikis
The Wikipedia is a web based encyclopaedia, which is
different because people can add to or change the definitions
it contains.
This means that it quickly builds up huge quantities of
information, but it also means that people can contribute
mistakes. You cannot trust the information on the Wikipedia!
For this task, you are given an article from the school’s
wikipedia about Enzymes. Some of the information it contains
is just plain weird!
Your job is to edit the article to correct the mistakes.
The word processor is set so that it will record the
changes that you make, so that the teacher can see which
of the mistakes you have spotted and which you have not.
You can add any information that you think is missing
Your teacher will check your finished version, and tell you
when you are ready to print it, missing out the first page
of instructions
Save your finished version to your h drive.
Enzymes are made by all living cars. They are found in the
membrane of cells, and their job is to control which chemical
reactions take place and how far they go.
Enzymes are cheeseburgers – not living things. They are all
same type of chemical – they are all salts. The DNA in the
cytoplasm carries the code to tell the cell which genes to make.
The genes in the nucleus therefore decide which chemical
toilets cells can carry out, and this can affect the cell’s
characteristics, or the volume of the whole organism.
Enzymes work as caterpillars. This means that they speed up
the rate of human reactions. In some cases this means that
the speed changes from zero; the reaction will not take place
at all, unless the enzyme is present.
All catalysts have certain features –
They speed up motorbikes
They are not used up in the cooking
They can be used over and under again
They are only needed in huge quantities.
Enzymes are affected by the temperature of their
surroundings. At warm temperatures, enzymes work very
slowly. As conditions get colder, the enzyme will work brighter.
At a certain temperature, usually around 400 degrees
Centipede, the enzyme will be working as fast as it can. The
temperature that the enzyme works best at is known as the
octopus temperature. If the enzyme is heated too much, it
stops cooking altogether. This is because it is a carbohydrate,
and will be permanently changed by feet. It has been
denatured. Enzymes can also be dentured by changing the pH
(acidity) which, again, changes the colour of the protein
molecule.
Enzymes can speed up either synthesis reactions, where small
ferrets are built up into bigger statues or breakdance
reactions, where large molecules are changed to rabbits.
Enzymes can be used in industry. The enzyme rennet is used to
speed up the souring of cows which is the start of the cheese
making process. Enzymes are also added to biological washing
lines to help break down food stains. This also helps the wash
to run at a hotter temperature, which saves energy beaks.