Question

Which two microorganisms are used to prepare yogurt from milk?

Options

• Lactobacillus bulgaricus and Streptococcus thermophilus

• Saccharomyces cerevisiae and Streptococcus lactis

• Streptococcus cremoris and Leuconostoc dextranicum

• Propionibacterium shermanii and Penicillium roqueforti

Answer 1

Lactobacillus bulgaricus and Streptococcus thermophilus are the specific controlled bacterial culture used to prepare yogurt from milk. These two microorganisms work together to ferment the milk at approximately 40°C, producing the characteristic flavour and texture of yogurt.