Discussion: The rate of enzyme activity
increased along with the surface area
of substrate. As particle size decreased, the surface area increased.
How does surface area affect catalase enzyme?
A larger surface area means that there
will be more catalase molecules coming in contact with the reacting substrate, hydrogen peroxide
.
How does the surface area to volume ratio affect enzyme activity?
If something has a large surface area to volume ratio it means
that it has a large surface area on which the enzyme can act
. For example: Bile emulsifies large fat droplets into tiny fat globules so that lipase can easily act on it.
What factors affect enzyme action?
Factors affecting enzyme activity
Enzyme activity can be affected by a variety of factors, such as
temperature, pH, and concentration
. Enzymes work best within specific temperature and pH ranges, and sub-optimal conditions can cause an enzyme to lose its ability to bind to a substrate.
How does particle size affect enzyme activity?
Changes in the size of particles and the viscosity of reaction media
, which all affect the mobility of the enzyme catalyst, evidently altered the intrinsic activity of the particle-attached enzyme. Compared to K(M), k(cat) appeared to be less sensitive to particle size and viscosity.
What happens to a cell surface area and volume when it grows?
As a cell grows bigger,
its internal volume enlarges and the cell membrane expands
. Unfortunately, the volume increases more rapidly than does the surface area, and so the relative amount of surface area available to pass materials to a unit volume of the cell steadily decreases.
Why is surface area to volume ratio important?
Smaller single-celled organisms have a high surface area to volume ratio, which allows them to rely on oxygen and material diffusing into the cell (and wastes diffusing out) in order to survive. The
higher
the surface area to volume ratio they have, the more effective this process can be.
Does surface area affect pH?
The surface area measurements
at lower pH are lower than those measured at higher pH
due to the replacement of Na(+) ions from interlayers at lower pH which may be followed by the reduction of repulsive forces.
How does surface area affect the rate of reaction?
If the surface area of a reactant is increased:
more particles
are exposed to the other reactant. there is a greater chance of particles colliding, which leads to more successful collisions per second. the rate of reaction increases.
Where is catalase produced in the cell?
Catalase is usually located in
a cellular organelle called the peroxisome
. Peroxisomes in plant cells are involved in photorespiration (the use of oxygen and production of carbon dioxide) and symbiotic nitrogen fixation (the breaking apart of diatomic nitrogen (N
2
) to reactive nitrogen atoms).
What are the steps in enzyme action?
- The enzyme and the substrate are in the same area. Some situations have more than one substrate molecule that the enzyme will change.
- The enzyme grabs on to the substrate at a special area called the active site. …
- A process called catalysis happens. …
- The enzyme releases the product.
What are the four factors that affect the rate of enzyme action?
Enzyme activity can be affected by a variety of factors, such as
temperature, pH, and concentration
. Enzymes work best within specific temperature and pH ranges, and sub-optimal conditions can cause an enzyme to lose its ability to bind to a substrate.
What are the 4 factors that affect enzyme activity?
Several factors affect the rate at which enzymatic reactions proceed
– temperature, pH, enzyme concentration, substrate concentration, and the presence of any inhibitors or activators
.
Does size affect enzyme?
The rate of enzyme activity
increased
along with the surface area of substrate. As particle size decreased, the surface area increased. … The larger the number of particle collisions per second, the faster the rate of enzyme activity (Clark, 2002).
What is the effect of particle size on the rate of reaction?
By decreasing the particle size of a reactant,
we are increasing its surface area
. The greater the surface area, the higher the chance of collisions, thus the faster the rate of reaction. The smaller the particle size the faster the reaction.
How does pH affect enzyme activity?
Enzymes are also sensitive to pH .
Changing the pH of its surroundings will also change the shape of the active site of an enzyme
. … This contributes to the folding of the enzyme molecule, its shape, and the shape of the active site. Changing the pH will affect the charges on the amino acid molecules.
