How do you think the scientific method can be used to measure the rate of photosynthesis

The rate of photosynthesis can be measured in different ways using the scientific method:

For example, oxygen can be measured by placing a plant in a water bath containing a capillary tube. The rate of bubbles being formed can be measured. From this, results can be deduced and conclusions can be drawn.

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme