Investigating Digestive Enzymes Flashcards
Why shouldn’t you use a visking tube to model the gut?
The gut is a lot longer and has a larger surface area so the rate if absorption and digestion will be different.
Why do you use a visking tube to model the gut?
Like the gut it only let’s small molecules pass
Cheaper easier and more efficient than using an animal gut
What do you use to test for sugar and starch?
Iodine tests for starch and Benedict’s for sugar
What does iodine show in water if it is orange/brown
No starch is present as the starch molecules are to large to pass through
Why does the Benedict’s change from blue
Sugar is present outside the tube as the small glucose molecules can pass through the membrane
The “” the concentration of amylase the “” the Benedict’s change colour
Higher and more
Why does the Benedict’s change colour when the concentration of amylase is higher
There are more active sites that break the starch into sugar.
Why does the reaction stay the same after a certain point
There are no more available active sites to deal with the starch
Does enzyme concentration affect the rate of reaction
Yes up to a point
