The function of beta-galactosidase is to blank space a) break down lactose b) break down glucose c) produce glucose

A) Break down of lactose and production of glucose.

Β-galactosidase is a glycoside hydrolases and breaks the lactose polysaccharide into two different monosaccharide called galactose and glucose. It is significant for life forms as it is a key supplier in the generation of vitality and a wellspring of carbons through the separate of lactose to galactose and glucose.

It is additionally significant for the lactose bigoted network as it is liable for making sans lactose milk and other dairy items.  

The function of beta-galactosidase is shown in the image below.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

radon is correct hope this