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WorksheetsEnzymes biology AICE
Total questions: 10
Worksheet time: 5mins
Inhibitors can be produced by the cell to:
regulate activity
act as a poison
all of the above
none of the above
Define catalyst
The greater the concentration of the enzyme, the faster the rate of reaction, provided there are enough substrate molecules present.
A molecules which speeds up a chemical reaction but remains unchanged at the end of the reaction.
Enzymes are proteins molecules
intracellular enzyme-
enzymes that operate within cells
enzymes that operate in the nucleus
enzymes that operate outside the cell
enzymes that operate in the inner linings of artery
Cells can control metabolic processes by restricting the location of enzymes and enzyme complexes to certain locations within the cell. True or false?
True
False
When the enzyme molecule begins to lose its shape and activity it is said to be
regulate activity
catalyzed
broken
denatured
Enzymes are proteins molecules which can be defined as
mode of action of enzymes
amino acids
biological catalysts
lock and key hypothesis
the lock is the enzyme and the key is the substrate. Only the correctly sized key (substrate) fits into the keyhole (active site) of the lock (enzyme).
It states that the shape of Active Sites are not exactly Complementary, but change shape in the presence of a specific substrate to become complementary.
a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
the substrates stops the enzyme from lowering the activation energy
Noncompetitive inhibitors have the ability to change the shape of the active site in such a way that it loses affinity for its substrate. True or false?
false
true
Induced fit hypothesis
the lock is the enzyme and the key is the substrate. Only the correctly sized key (substrate) fits into the keyhole (active site) of the lock (enzyme).
The greater the concentration of the enzyme, the faster the rate of reaction, provided there are enough substrate molecules present.
It states that the shape of Active Sites are not exactly Complementary, but change shape in the presence of a specific substrate to become complementary.
mode of action of enzymes
A competitive inhibitor will block the enzyme's active site (ie: it will occupy the same space as the natural substrate, blocking it from being catalyzed). A non-competitive inhibitor will bind to the enzyme somewhere other than the active site of the enzyme; an allosteric site
An enzyme has a cleft in its surface, called the active site. The substrate molecule has a complementary shape. b) Random movement of enzyme and substrate brings the substrate into the active site. An enzyme-substrate complex is temporarily formed. The R groups of the amino acids in the active site interact with the substrate. c) The interaction of the substrate with the active site breaks substrate apart. An enzyme-product complex is briefly formed, before the two product molecules leave the active site , leaving the enzyme molecule unchanged and ready to bind with another substrate molecule.
