Why is collagen classified as a protein? a: it is found in a tissue. b: it is made up of amino acids. c: it is made up of twisted chains. d: it is found throughout the human body.

B: It is made up of amino acids.

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enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products