Complete the following paragraph relating to the enzyme, β–galactosidase. This enzyme hydrolyses the disaccharide lactose to constituent monosaccharides, galactose and glucose. Drag and drop the appropriate words into the correct space. For white spaces in the sentences select from the following below

The enzyme β-galactosidase is added to a solution of lactose: over time, the number of
water molecules present in the solution (1)………………….At the same time the number of
molecules of lactose in the solution (2)………………………….and the number of molecules of
galactose and glucose in the solution (3)…………………………….. The number of molecules of β–galactosidase in the solution(4) ………………………… .

1) decreases
2) decreases
3) increase
4) …………?…………….(I don’t know) I need the correct answer for this

Could you plz tell me the last one which one is correct from the following, I need the correct answer please. Thanks

a) Increases
b) decreases
c) stays the same
d) increase
e) decrease
f) stay the same

Since Jiskha doesn't have a biology expert at this time, please try posting your question at this site.

http://www.biology-online.org/biology-forum/

To determine the correct answer for the fourth space, let's break down the given information:

"The enzyme β-galactosidase is added to a solution of lactose: over time, the number of water molecules present in the solution (1)………………….At the same time the number of molecules of lactose in the solution (2)………………………….and the number of molecules of galactose and glucose in the solution (3)…………………………….."

Based on this information, we know that β-galactosidase hydrolyzes lactose into its constituent monosaccharides, galactose, and glucose. Since hydrolysis involves the addition of water molecules to break bonds, we can conclude:

1) The number of water molecules in the solution increases.
2) The number of lactose molecules in the solution decreases.
3) The number of galactose and glucose molecules in the solution increases.

Therefore, in the fourth space, the correct answer is:

a) Increases

I hope this helps! Let me know if you have any other questions.