181007
Descrição
Mapa Mental por Matthew Law, atualizado more than 1 year ago
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Criado por Matthew Law
mais de 12 anos atrás
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Enzymes
- enzymes = PROTEINS
PRODUCED BY LIVING THINGS
- enzymes are produced by living things (plants, animals, Ian, etc.) in order to
- speed up chemical reactions
- remember that.
- remember that.
- speed up chemical reactions
- living things have thousands of different
chemical reactions going on inside them tout
de la temp; they need to be carefully controlled
in order to get the amounts of substances right
- the instructions for making enzymes (or
any other protein) are found in a cell's
genes (i.e. DNA)
- enzymes are produced by living things (plants, animals, Ian, etc.) in order to
- enzymes NEED THE RIGHT
TEMPERATURE & pH
- changing the temperature
changes the rate of reaction
- a higher temperature increases the rate at first
- but if it gets too hot, some of the bonds
holding the enzyme together will break
- this changes the shape of
the enzyme's über specific
active site, meaning that the
substrate no longer fits and
the enzyme no longer works
- the enzyme is said to be 'denatured'
- the enzyme is said to be 'denatured'
- this changes the shape of
the enzyme's über specific
active site, meaning that the
substrate no longer fits and
the enzyme no longer works
- but if it gets too hot, some of the bonds
holding the enzyme together will break
- a higher temperature increases the rate at first
- it's the same (as
the temperature)
with the pH...
- ...all enzymes
have an
optimum pH...
- ...if the pH is too high
or too low, it interferes
with the bonds holding
the enzyme together...
- ...and the active
site accordingly
changes shape
- again, the
enzyme is
said to be
'denatured'
- again, the
enzyme is
said to be
'denatured'
- ...and the active
site accordingly
changes shape
- ...if the pH is too high
or too low, it interferes
with the bonds holding
the enzyme together...
- ...all enzymes
have an
optimum pH...
- changing the temperature
changes the rate of reaction
- enzymes = ÜBER SPECIFIC
- and I mean über
- the substrate = the molecule that's
CHANGED in a reaction.
- chemical reactions usually involve stuff
being either joined together or split apart
- every enzyme has an active site, where
the enzyme is joined onto the substrate
- as I said, über
specific: each
enzyme can
usually only speed
up one reaction
- this is because, for an enzyme to
work, a substrate must be the RIGHT
SHAPE to fit into the active site
- this is a bit like a lock and key,
hence is called the (highly
imaginative) 'lock and key' model
- observe the beautifully
plagiarized diagram to
the left of me
- observe the beautifully
plagiarized diagram to
the left of me
- this is a bit like a lock and key,
hence is called the (highly
imaginative) 'lock and key' model
- this is because, for an enzyme to
work, a substrate must be the RIGHT
SHAPE to fit into the active site
- and I mean über
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