As a human nerve cell (a neuron) matures, it will not be able to replace itself if it becomes too damaged. Which statement best describes what happens to the neuron
as it matures?
a. it loses the ability to carry out active transport
b. it is no longer able to go through mitosis
c. it is no longer able to manufacture ATP
d. it is no longer able to process and package proteins.

help please!!!

1. an enzyme is considered a(n) because it speeds up a chemical reaction without being used up.2. in a catalyzed reaction, a reactant is often called a(n) . an enzyme is specific because the shape of its matches only particular reactants.4. an enzyme speeds up reactions by lowering the . the between an active site and its substrate often strains bonds and the reaction proceed.6. a( , which is often a vitamin, binds to an enzyme and plays a role in catalysis.7. high temperatures or changes in ph can an enzyme, causing it to lose its shape and biological activity.