Question

Match the following:
\begin{tabular{ll} List-I & List-II
(A) Gassiness & (I) Kefiran
(B) Leuconostoc sp. & (II) Implant in intestinal tract
(C) Lactobacillus acidophilus & (III) Cultured butter milk
(D) Polysaccharide & (IV) Kluveromyces

Choose the correct answer from the options given below:

• (A) - (IV), (B) - (III), (C) - (II), (D) - (I)
• (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

Hint:

Lactobacillus acidophilus is famous as an intestinal implant probiotic (C - II).
Kefiran is the specific polysaccharide of kefir grains (D - I).
Matching these two will easily lead to the correct option.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
This matching question covers starter culture organisms, their metabolic properties, probiotic functions, and unique biochemical products.

Step 2: Detailed Explanation:
Let us correlate the items in List-I with their appropriate descriptions in List-II:
- (A) Gassiness: This is caused by gas-producing yeasts in fermented products like kefir.
The lactose-fermenting yeast Kluyveromyces (such as K. marxianus) produces carbon dioxide (\( \text{CO}_2 \)) and alcohol, creating characteristic gassiness and carbonation.
Thus, (A) matches with (IV).
- (B) Leuconostoc sp.: This heterofermentative lactic acid bacterium is a key aroma-producing culture utilized in the manufacture of Cultured buttermilk to produce diacetyl.
Thus, (B) matches with (III).
- (C) Lactobacillus acidophilus: This is a well-known probiotic bacterium of human origin.
Unlike transient yogurt cultures, it has the ability to survive gastric acid and bile, colonizing and implanting in the human intestinal tract.
Thus, (C) matches with (II).
- (D) Polysaccharide: Kefiran is a water-soluble, branched exopolysaccharide produced by lactic acid bacteria (specifically Lactobacillus kefiranofaciens) within kefir grains.
Thus, (D) matches with (I).
Combining these pairs, we get: (A)-(IV), (B)-(III), (C)-(II), (D)-(I).

Step 3: Final Answer:
The correct matching sequence corresponds to option 1.