Question

Which of the following properties of starch makes it useful as storage material?
1. Easily translocated
2. Chemically nonreactive
3. Easily digested by animals
4. Osmotically inactive
5. Synthesised during photosynthesis.

• A. 1, 3, 5
• B. 1 and 5
• C. 2 and 3
• D. 2 and 4

Answer 1

The correct option is D 2 and 4

Starch is formed by a-1,4 linkages between two glucose unit which is broken down during its digestion. It is stored food material of plant cells. It is a nonreducing sugar as it has no free OH group on the anomeric carbon which makes it chemically nonreactive. It is very large in size so it cannot pass through semipermeable membrane easily during the process of osmosis and thus it is easy to store.

So, the correct answer is option D.