Read the following statements.
Statement I: The puffed up appearance of dough is due to the production of methane.
Statement II: Lactobacillus and other commonly called LAB, convert milk in to curd.
In the light of given statements, choose the correct answer from the options given below.

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Both statement I and statement II are incorrect

Both statement I and statement II are correct

Statement I is correct but statement II is incorrect

Statement I is incorrect but statement II is correct

answer is D.

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Detailed Solution

Statement – I is incorrect. The puffed-up appearance of dough, such as in bread-making, is primarily due to the production of carbon dioxide (CO₂) gas. Yeast, a common microorganism used in baking, ferments sugars present in the dough, producing CO₂ as a byproduct.
Statement – 2 is correct. Lactic acid bacteria (LAB), including species of Lactobacillus, are used in the production of various dairy products, including curd (also known as yogurt). These bacteria ferment the lactose (milk sugar) present in milk, converting it into lactic acid.

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