Answered



Which statement best describes enzymes?

(1) Every enzyme controls many different

reactions.

(2) The rate of activity of an enzyme might

change as pH changes.

(3) Temperature changes do not affect enzymes.

(4) Enzymes are produced from the building

blocks of carbohydrates.

Verified Answer :

The best which describes an enzyme is 2.
 Every enzyme can control one or more types of reaction whereby the rate of activity of an enzyme will be influenced by PH and temperature.
Enzyme increases its reaction rate by lowering its activation energy. Some enzymes are being used commercially for example in the synthesis of antibiotics.

Answer:

The correct answer is statement 2.

Explanation:

Enzymes refer to the molecules of protein that functions as a biological catalyst. The enzymes accelerate the rate of chemical reactions, however, in the process they do not get used up completely. Many factors influence the rate at which an enzyme functions. These are pH. temperature, concentration of substrate, concentration of enzyme, and the existence of any activators or inhibitors.  

The rate of the function of an enzyme changes with the change in pH. The most favorable pH value, that is, the point at which the enzyme is most functional is considered as the optimum pH. Extremely low or high pH values usually leads to complete loss of the activity for the majority of enzymes. pH also functions as a factor of the stability of the enzymes. For each enzyme, there is a region of pH optimal stability.  

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