Question

Which statement about enzymes is true?

Answer 1

statement about enzymes that is correct is

b. they are large molecules that increase the rate of biologically important reactions

Enzymes are proteins that catalyse, in other words increase the rate of the biological reactions.

Biological functions that are vital for the bodies to survive, have large activation energy barriers. For this reason enzymes are used that reduce the activation energy required for the reaction to initiate. this enables the reactions to proceed.

Substrates bind to the enzyme, reaction occurs and substrate converts to products, that are released from the enzyme, leaving the enzyme unchanged.

so the correct answer is B.

Answer 2

Enzymes are body (natural) catalysts – they increase the rate and actually are made out of aminoacids – like proteins, so large molecules. B) is the answer.