Which statement about enzymes is true?

a)They are large molecules that decrease the rate of reactions in the body.
b)They are large molecules that increase the rate of biologically important reactions.
c)They slow the rate of chemical reactions.
d)They are permanently changed in the course of a reaction.

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.

Answer Link

blahblahmali blahblahmali · Answer 2 · 2018-08-17T14:06:56+02:00

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.