Question

from the results of experiment 8.3, what is your conclusion regarding the effect of the substrate on enzymes activity?

	lactaid + water	lactaid + lactose	lactaid + starch	lactaid + beans
5 min		250	neg	neg
10 min		500	neg	neg
15 min		1000	neg	neg
20 min	neg	2000+	neg	neg

the enzyme is active when it is present with any polymer of glucose
the enzyme is active only when lactose is present
the enzyme is more active with increasing concentration of glucose
the enzyme is more active with increasing concentration of lactose

Explanation:

The table shows that only when lactose is present with Lactaid does the enzyme - activity measurement increase over time. With water, starch, and beans, there is no enzyme - activity detected. This indicates that the enzyme is active only when lactose is present.

Answer:

The enzyme is active only when lactose is present