Question

Which of the following bacteria is/are involved in the production of yoghurt?

• A. Streptococcus thermophilus
• B. Saccharomyces cerevisiae
• C. Lactobacillus brevis
• D. Lactobacillus delbrueckii

Answer 1

Answer: (A), (D)

The correct options are
A Streptococcus thermophilus
D Lactobacillus delbrueckii

Yoghurt is one of the milk products. In order to maintain the protein content of the product, milk powder is mixed with milk and then boiled. After boiling, milk is left to cool until temperature is warm. Streptococcus thermophilus, Lactobacillus delbrueckii is added to this warm milk which results in the production of lactic acid, which gives consistency to the yoghurt.