Question

1. true or false: substrates frequently bind to the active site of enzymes using a covalent bond

2. true or false: a competitive inhibitor of an enzyme-catalyzed reaction maintains the same Vmax of the reaction and increase the KM

3. when dividing cells, the physical separation of chromosomes during the mitotic phase depends on what molecular complexes?

a. microtubules

b. myosin and actin filaments

c. myosin

d. kinesin

e. microtubules motors and microtubule

Answer 1

1. Answer - False

Active site is where the substrate molecule bind with the enzyme and undergo a chemical reaction. Interaction between the active site and the substrate is non covalent and transient.

2. True

Competetive inhibition of an enzyme is binding of an inhibitor prevents binding of the target molecules present in the enzyme.Competitive inhibition alters only the Km,and the Vmax will be same.Km is the amount of substrate needed to reach the half of V max and Vmax is the maximum velocity of reaction

3.Microtubules --it is made up of proteins.They pull or push the chromatid part towards opposite poles.