Which of the following is not true about enzymes? a. They are consumed by the reactions they catalyze. b. They are usually made of amino acids. c. They loser the activation energy of chemical reactions. d. Each one is specific to the particular subtrate(s) to which it binds.

Enzymes are referred to as biological catalysts because they help to increase the rate at which biochemical reactions occur in the living cells and tissues.

Enzymes have distinctive characteristics that defines them, some of those characteristics are:

Enzymes are proteinous in nature i.e. they usually made of amino acids.

Enzymes are substrate-specific, meaning that they bind to and act on only specific substrate. For example, amylase enzyme only acts on starch.

Enzymes are not consumed in reactions they catalyze i.e. enzymes can be reused after catalyzing a reaction.

Enzymes, just like every other catalyst, lower the activation energy of the reactions they catalyze, hence, making them proceed faster.

Therefore, the untrue statement about enzymes is that "they are consumed by the reactions they catalyze".

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