Question

Which role is played by lactic acid bacteria (LAB) in our stomach?

• A. Beneficial
• B. Harmful
• C. Neutral
• D. All of these

Hint:

NCERT states that LAB: \[ \textit{Lactobacillus} \] present in curd:
• Improve nutritional quality of food
• Increase Vitamin \(B_{12}\) content
• Check disease-causing microbes in the stomach and intestine Therefore, \[ \boxed{\text{LAB are beneficial bacteria}} \]

Answer 1

The Correct Option is A

Step 1: Recall the function of LAB. Lactic Acid Bacteria (LAB), such as: \[ \textit{Lactobacillus} \] are beneficial microorganisms commonly present in curd and the human digestive tract.

Step 2: Understand their role in the gut. LAB help in maintaining a healthy microbial balance in the intestine. They:
• Suppress harmful microbes
• Improve digestion
• Enhance nutrient availability
• Promote overall gut health

Step 3: Evaluate the options.
• Beneficial \(\rightarrow\) Correct \(\checkmark\)
• Harmful \(\rightarrow\) Incorrect \(\times\)
• Neutral \(\rightarrow\) Incorrect \(\times\)
• All of these \(\rightarrow\) Incorrect \(\times\) Therefore, \[ \boxed{\text{Beneficial}} \] is the correct description of LAB in our digestive system. Hence, the correct answer is: \[ \boxed{\text{(A)}} \]