Procedure:Add lemon juice to a cup of milk . See the changes. Milk changes into curds.<br> How did this change take place? (Lactococcus lactis is a microbe classified informally as a Lactic Acid Bacterium <br>because it ferments milk sugar (lactose) to lactic acid.)[[File:lactus bacteria.jpg|100px|left]][[File:Curds.jpg|100px|left]] | Procedure:Add lemon juice to a cup of milk . See the changes. Milk changes into curds.<br> How did this change take place? (Lactococcus lactis is a microbe classified informally as a Lactic Acid Bacterium <br>because it ferments milk sugar (lactose) to lactic acid.)[[File:lactus bacteria.jpg|100px|left]][[File:Curds.jpg|100px|left]] |