Answer:
Exterior of the cell
Explanation:
Pancreas is a gland found behind the stomach and it secretes digestive enzymes into the duodenum.
Digestive enzymes are proteins hence leucine will form part of the enzymes.
Digestion of food takes approximately three hours. Therefore, if labelled Leucine is chased down with non radioactive leucine.
Black spots will appear on the exterior of the cells because digestive enzymes are extracellular enzymes .
Catalysts increases the rate of a reaction by lowering the need for a larger reaction. Basically, the more reactions that are created, the faster the rate of the reactions will become. An example of this is Amylase in our saliva.
The story between the two pairs of scientists, Watson and Crick, who discovered just one of "the most important molecule in the history" is a series of ups and downs. They are an unlikely pair and they had difficulty in unraveling the molecule because neither are that much knowledgeable on structural chemistry.
