Chemical reactions can occur when sufficient is supplied to overcome the activation energy. in the lab, heating a mixture of often overcomes the activation energy. an elevation in temperature the kinetic energy of the molecules. this provides enough energy to chemical bonds. this is not feasible in living cells because a change in temperature of this type will cause the proteins to and cause cell . to assist with this problem, cells use biologically active protein catalysts called to facilitate chemical changes.

Chemical reactions can occur when sufficient heat is supplied to overcome the activation energy. In the lab, heating a mixture of substances often overcomes the activation energy. An elevation in temperature increase kinetic energy of the molecules. This provides enough energy to break chemical bonds. This is not feasible in living cells because a change in temperature of this type will cause the proteins to disintegrate and cause cell death. To assist with this problem, cells use biologically active protein catalysts called enzymes to facilitate chemical changes.

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Explanation:

Chemical reactions can occur when sufficient energy is supplied to overcome the activation energy. In the lab, heating a mixture of reactants often overcomes the activation energy. An elevation in temperature increases the kinetic energy of the molecules. This provides enough energy to break chemical bonds. This is not feasible in living cells because a change in temperature of this type will cause the proteins to denature and cause cell die . To assist with this problem, cells use biologically active protein catalysts called enzymes to facilitate chemical changes.

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explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

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