Question

1. in figure 3 above, why does chemical reaction b result in

o reaction\?
a. the substrate and product do not have complementary shapes
b. the enzyme and substrate have complementary shapes
c. the substrate and enzyme do not have complementary shapes
d. the enzyme and product do not have complementary shapes

Explanation:

Enzymes work via the lock - and - key or induced - fit model, where the enzyme and its specific substrate must have complementary shapes for the reaction to occur. If a chemical reaction (involving an enzyme) results in “no reaction”, it's because the substrate and enzyme don't have complementary shapes (option c). Option a is wrong as product - substrate shape complementarity isn't relevant for the reaction initiation. Option b is incorrect because complementary shapes are needed for the reaction. Option d is wrong as enzyme - product shape complementarity isn't a factor for the reaction to start.

Answer:

c. the substrate and enzyme do not have complementary shapes