Tube | Contents |
Result to Benedict's test (reducing sugars)
|
Comment |
A | Glucose | + |
As expected: glucose is a reducing sugar - proving Benedict's reagent and heating technique successful |
B | Liquid X | - |
Not a reducing sugar |
C | Liquid Y | - |
Not a reducing sugar |
D | X + Y incubated together | + |
Reducing sugar produced by the action of X on Y (or Y on X) |
E | X [heat treated] + Y incubated together | - |
Heat-treating X has an effect: stopping reaction – probably an enzyme (protein denatured) |
F | X + Y [heat treated] incubated together | + |
Heat-treating Y has no effect , so Y is not an enzyme. More likely to be a sugar. |