Question

Dosa, Dhokla and Idli are the fermented preparations of rice and black Gram with ________ species of bacteria.

• A. Leuconostoc and Streptococcus
• B. Lactobacillus and Streptococcus
• C. Bacillus and Streptomyces
• D. Pseudomonas and Streptomyces

Hint:

Lactic acid bacteria Leuconostoc and Streptococcus ferment the rice and black gram batter.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept
Dosa, idli and dhokla batters are made from rice and black gram and left to ferment.

Step 2: Organisms involved
Lactic acid bacteria such as Leuconostoc and Streptococcus carry out the fermentation.
They produce lactic acid for sour taste and gas that makes the batter puff up.

Step 3: Why the other options fail
Bacillus, Streptomyces and Pseudomonas are not the bacteria used in these preparations.

Final Answer:
The bacteria are Leuconostoc and Streptococcus. \[ \boxed{\text{(A) }\text{Leuconostoc and Streptococcus}} \]