Which of the following statements describes how enzymes differ from ordinary chemical catalysts?
enzymes are inorganic in nature.
enzymes catalyze select chemical reactions.
enzymes bind their substrates for a brief time.
enzymes increase the rate of a chemical reaction.

Option (b) is the correct answer.

Explanation:

A catalyst is a specie that helps in increasing the rate of a chemical reaction by lowering the activation energy. A catalyst does not get consumed in a chemical reaction.

Whereas an enzyme is a protein that helps in carrying out a specific biochemical reaction without itself getting consumed. An enzyme also increases the rate of a biochemical reaction.

Unlike catalysts, enzymes bind to a substrate by lock and key method. This means that reactant molecules have a lock and enzymes act as key. Therefore, enzymes bind at the specific site of a reactant.

Thus, we can conclude that the statement enzymes catalyze selective chemical reactions, describes how enzymes differ from ordinary chemical catalysts.

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml

so what is the problem with your lab report and whats the subject of the lab report? i will you