What results will the scientist most likely obtain when placing drops of the indicator on the leaves?

Explanation:

dark purple is the answer.

Considering that the indicator is Phenolphthalein, then it will remain colourless. If it is methyl orange, then it will become red. If it is universal indicator, then it will become blue to dark blue. Because leaves are slightly acidic.

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