0
Give 2 explanations for the fact that only certain substrate molecules will fit into this part of the enzyme molecule?
A substrate molecule will only fit into the active site if it is a complimentary shape. Also the amino acids that make up an enzyme have positively and negatively charged chemical groups so in orderr for a substrate to fit its active site any electrical charges on the substrate molecule must not be repelled by like charges on the enzyme so the charged groups on the enzyme molecule and substrate molecule must attract one another
What else can I help you with?
Are Enzymes specific to particular molecules?
Enzymes are proteins that catalyse (speed up) a reaction. They are very specific; enzymes will only bind a very specific molecule (or molecules containing a very specific chemical group). They normally have no effect on molecules that are not their substrate (the specific type of molecule they can interact with). Enzymes work because they have a specific shape and an 'active site'. The active site is the part of the enzyme that will bind its substrate and it may be charged in specific places so that it attracts and binds tightly to the substrate. Because the active site is the right shape and charge for the substrate, it can bind it efficiently and when it does this it causes the enzyme to change shape and catalyse a chemical reaction. Other molecules that are the wrong size, shape or charge will simply not fit into the active site or will be repelled, so the enzyme doesn't affect them. Some enzymes contain complex metal ions at their active site which help create the right conditions to bind the substrate, by adding a certain charge in a certain place. Enzymes can be 'fooled' by molecules of a very similar size, shape and charge as their normal substrate. Many toxins work in this way, by being similar to a certain molecule that the enzyme normally binds to. The toxins cause a problem because they are slightly different from the actual substrate and so don't react but just occupy the active site permanently or until they fall out. This means that the enzyme is useless.
Does enzymes catalyze specific chemical reactions because the shape of their active site allows only certain substrate molecules to enter?
Yes.
How pro duct concentration affect enzyme activity?
Increasing substrate concentration can initially increase enzyme activity as more substrate molecules are available for the enzyme to bind to. However, at a certain point, the enzyme becomes saturated with substrate molecules and enzyme activity levels off. Very high substrate concentrations can also lead to competitive inhibition or product inhibition which can inhibit enzyme activity.
Can an enzyme bind to nearly any molecule?
Enzymes have specific binding sites that match the shape and properties of their target molecules, known as substrates. While many enzymes can interact with a variety of molecules, they generally have higher affinity and specificity for certain substrates based on their chemical structure and functional groups. This specificity allows enzymes to catalyze specific chemical reactions in living organisms.
Why will only certain substrate molecules fit into the active site?
It will only bind with the enzymes active site of the shapes are complimentary and enzymes are very specific
What ATP molecules are produced per molecule of glucose degraded during glycolysis is?
In glycolysis, ATP molecules are produced by? a- oxidative phosphorylation b-substrate-level phosphorylation c-cellular respiration d-photophosphorylation e-photosynthesis
Substrate molecules bind to enzymes where?
The bind in the active site.
Are Enzymes specific to particular molecules?
Enzymes are proteins that catalyse (speed up) a reaction. They are very specific; enzymes will only bind a very specific molecule (or molecules containing a very specific chemical group). They normally have no effect on molecules that are not their substrate (the specific type of molecule they can interact with). Enzymes work because they have a specific shape and an 'active site'. The active site is the part of the enzyme that will bind its substrate and it may be charged in specific places so that it attracts and binds tightly to the substrate. Because the active site is the right shape and charge for the substrate, it can bind it efficiently and when it does this it causes the enzyme to change shape and catalyse a chemical reaction. Other molecules that are the wrong size, shape or charge will simply not fit into the active site or will be repelled, so the enzyme doesn't affect them. Some enzymes contain complex metal ions at their active site which help create the right conditions to bind the substrate, by adding a certain charge in a certain place. Enzymes can be 'fooled' by molecules of a very similar size, shape and charge as their normal substrate. Many toxins work in this way, by being similar to a certain molecule that the enzyme normally binds to. The toxins cause a problem because they are slightly different from the actual substrate and so don't react but just occupy the active site permanently or until they fall out. This means that the enzyme is useless.
The specificity of an enzyme is due to its active siteThe active site is a shape only a certain?
substrate can fit into, due to complementary shapes and charges. This allows the enzyme to specifically catalyze a particular reaction. Any changes to the active site can impact the enzyme's ability to bind to its substrate and perform its function.
Explain the difference between substrate and active site?
The substrate is the molecule that binds to the active site of an enzyme. The active site is a region on the enzyme where the substrate binds and undergoes a chemical reaction. The specificity of the active site allows only certain substrates to bind and react with the enzyme.
Does enzymes catalyze specific chemical reactions because the shape of their active site allows only certain substrate molecules to enter?
Yes.
How pro duct concentration affect enzyme activity?
Increasing substrate concentration can initially increase enzyme activity as more substrate molecules are available for the enzyme to bind to. However, at a certain point, the enzyme becomes saturated with substrate molecules and enzyme activity levels off. Very high substrate concentrations can also lead to competitive inhibition or product inhibition which can inhibit enzyme activity.
Can an enzyme bind to nearly any molecule?
Enzymes have specific binding sites that match the shape and properties of their target molecules, known as substrates. While many enzymes can interact with a variety of molecules, they generally have higher affinity and specificity for certain substrates based on their chemical structure and functional groups. This specificity allows enzymes to catalyze specific chemical reactions in living organisms.
Why will only certain substrate molecules fit into the active site?
It will only bind with the enzymes active site of the shapes are complimentary and enzymes are very specific
what is a substrate in an enzyme?
A substrate is when the enzyme can only join onto certain substances
How do you change molecular orientation?
Introducing certain enzymes could change the orientation of a molecule, otherwise molecules must collide in the proper direction. And, it depends on what the molecules are from.
What is a binding site and why does it have a specific shape?
A binding site is the outer part of the protein that is folded into a unique shape. It has to have this certain shape, otherwise the enzyme and substrate will not fit together. This is called a "lock and key" mechanism.
