Processing foods can make the food safer, more palatable and extend its shelf-life. It can also change the structure and nutritional composition of food. From the list below, choose the main effect of processing in the following situations:
-$\bullet$Dennis makes his own yoghurt using a starter culture of Lactobacillus bulgaricus and Streptococcus thermophilus. These micro-organisms ferment the lactose to produce lactic acid which causes the milk to coagulate and taste sour

Question

Quizplus · Accepted Answer

The micro-organisms in the starter culture ferment the lactose in the milk, producing lactic acid which acidifies the milk and causes it to coagulate and turn into yoghurt. This acidification provides a sour taste and also acts as a preservative by inhibiting the growth of harmful micro-organisms.

Processing Foods Can Make the Food Safer, More Palatable and Extend