What is activation energy? a. energy required by the substrate to fit into the active site b. energy supplied by enzymes in a chemical reaction c. energy released when reactants combine to become products d. energy required to break the chemical bonds of the reactants

energy required to break the chemical bonds of the reactants

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex