A:air
because the flag would on blow if it had some kind of wind
The substrate and the active site both need to fit together perfectly in order for the enzyme to work properly. If their shape is changed, typically through heat or a change in pH, the enzyme will not work.
So the answer for (a) is basically the enzyme is breaking down the protein (which is the colored part) and this leaves the clear.
For the constants it would be the film and the temperature that the solution is at
For the final question, they could be improved by using more data and multiple trials
The two organs have different adrenergic receptors for NE.
The human activity banned is restaurandts and most public areas is smoking