# DBT JRF 2020 — Question 121

Exam: DBT JRF 2020 · Section: B · Topic: Biotechnology · Difficulty: Hard

## Question

Match the polysaccharides (L.H.S.) with the microbial cultures (R.H.S.) associated with their industrial production
| Polysaccharide | Microbial Culture |
| --- | --- |
| (P) Cellulose | 1. Pseudomonas aeruginosa |
| (Q) Alginate | 2. Alcaligenes faecalis |
| (R) Curdalan | 3. Gluconacetobacter hansenii |
| (S) Poly-hydroxy butyrate | 4. Ralstonia eutropha |

## Options

- **A.** P-3, Q-1, R-2, S-4
- **B.** P-1, Q-2, R-3, S-4
- **C.** P-2, Q-1, R-4, S-3
- **D.** P-1, Q-3, R-2, S-4

## Answer

Option B

## Explanation

Matching polysaccharides to microbial producers: Cellulose — produced by Gluconacetobacter hansenii (= Acetobacter xylinum); also Agrobacterium, Sarcina. Alginate — produced by Pseudomonas aeruginosa (mucoid strains in CF lungs) and Azotobacter vinelandii; also seaweed (brown algae), but microbially: Pseudomonas. Curdlan — $\beta$ -1,3-glucan produced by Alcaligenes faecalis (= Agrobacterium biovar 1 strain). PHB (Polyhydroxybutyrate) — produced by Ralstonia eutropha (now Cupriavidus necator); also Bacillus megaterium. The match P-3 (cellulose-Gluconacetobacter), Q-1 (alginate-Pseudomonas), R-2 (curdlan-Alcaligenes), S-4 (PHB-Ralstonia) — as given in the explanation.

Source: https://mypyqbuddy.com/questions/match-the-polysaccharides-l-h-s-with-the-6a05a8a02adafec470293291