Enzymes are affected by

Answer 1

There are several factors that affect enzyme itself.

1. Temperature

As the shape specificity of the enzyme's active site is vital for any enzyme reaction, therefore an optimal temperature is important for enzymes. Enzymes will be inactive under low temperatures since it has too low kinetic energy to start the reaction or quickens the reaction. Alternatively, enzyme's structure and the shape of active site will changed in high temperature. Eventually, enzymes are denature and never can be used again.

2. pH value

As mentioned, the structure of enzyme is highly sensitive to the external environment, therefore pH value of the environment also has an effect on enzymes. Again, the shape of enzymes changed outside the range of pH value that suits particular enzymes. For instance, the optimum pH value for enzymes in stomach is around pH 2 whereas most are pH 7.

3. Presence of inhibitor

There are 2 types of inhibitor, one is non-competition inhibitor. These inhibitors will bind to the allosteric site (alternative site) of the enzymes that alters the shape of active site, therefore preventing the substrate from binding the enzymes and having reactions.

Answer 2

Temperature

Below optimum point (usually 37 to 40C) not much kinetic energy thus less collision will happen, above it protein enzymes will be denatured by the rigorous molecular motions, thus ionic and hydrogen bonds that hold the 3 dimensional shape of enzymes are disrupted.

pH

Too much acidity or if the enzyme environment is too basic, intra and intermolecular bonds that holds the enzyme's 3 dimensional shape will be disrupted, thus denaturing the enzyme, and destroying its capability of fitting in or locking in to the substrate.

Inhibitors

Inhibitors are substances that bind to enzyme and decrease enzyme activity... look at the related link below.

Enzyme and Substrate Competition

...

Answer 3

Enzymes are affected by factors such as temperature, pH, substrate concentration, and the presence of inhibitors or activators. Changes in these factors can alter enzyme activity and ultimately affect the rate of chemical reactions catalyzed by enzymes.

Answer 4

All of these:

pH

Salinity

Cofactors

Temperature

Answer 5

Enzymes are sensitive to pH and temperature changes.

Answer 6

Enzymes affects activation energy. Enzymes do not affect Delta G and they do not affect Keq which is product divided by substrate.