Question:
For the manufacture of yoghurt, the two bacteria used as starter culture are:
For the manufacture of yoghurt, the two bacteria used as starter culture are:
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Yoghurt starter: L. bulgaricus + S. thermophilus.
Synergistic relationship.
Produces characteristic flavour and texture.
Synergistic relationship.
Produces characteristic flavour and texture.
Updated On: Aug 18, 2026
- Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus
- Lactobacillus acidophilus and Lactobacillus helveticus
- Lactobacillus casei and Lactococcus lactis
- Lactococcus lactis and Streptococcus thermophilus
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Yoghurt is a fermented milk product.
It uses specific starter cultures.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the yoghurt starter cultures.
Step 3: Detailed Explanation:
Yoghurt is made using two bacteria:
Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus.
They work synergistically.
L. acidophilus is used in probiotic products.
L. casei is used in some fermented products.
Thus, the correct combination is L. bulgaricus and S. thermophilus.
Step 4: Final Answer:
The two bacteria used are Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus.
Hence, the correct option is (A).
Yoghurt is a fermented milk product.
It uses specific starter cultures.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the yoghurt starter cultures.
Step 3: Detailed Explanation:
Yoghurt is made using two bacteria:
Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus.
They work synergistically.
L. acidophilus is used in probiotic products.
L. casei is used in some fermented products.
Thus, the correct combination is L. bulgaricus and S. thermophilus.
Step 4: Final Answer:
The two bacteria used are Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus.
Hence, the correct option is (A).
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