Question

A complex polysaccharide produced from sucrose by the bacterium Leuconostoc mesenteroides is:

• A. Chitin
• B. Starch
• C. Cellulose
• D. Dextran

Answer 1

The correct option is D

Dextran

The correct option is D.

Explanation of correct option:

1. Dextran is a complex polysaccharide.
2. It is produced from sucrose by the bacterium Leuconostoc mesenteroides.
3. The bacterium produces dextran by sucrose fermentation.
4. Dextran is widely used to treat shock, hemorrhage, hypovolemia, etc.

Explanation of incorrect option:

Option A:

Chitin is a polysaccharide that is mostly found in the exoskeleton of arthropods.

Option B:

Starch, a polysaccharide, is present in plant tissues. It acts as a storehouse of energy.

Option C:

Plant cell wall contains a polysaccharide called cellulose. It is a homopolymer that provides rigidity to plant cells.

Final answer

A complex polysaccharide produced from sucrose by the bacterium Leuconostoc mesenteroides is dextran.