Question

Starch is insoluble, yet it accumulates in large quantity in Potato tuber because

• A. Storage product should be insoluble.
• B. Starch is synthesised in tubers.
• C. Tubers respire slowly.
• D. Translocated sucrose is polymerised here.

Answer 1

The correct option is B Starch is synthesised in tubers.

The stored starch is used by the tubers during unfavourable condition like dormancy. Starch is formed by a-1,4 linkages between two glucose unit which is broken down during its digestion. It is storage food material of plant cells. Oval and eccentric starch grains occur in potato which is stored to support the plant during scarcity. Starch grain has a central proteinaceous area called helium around which the starch is deposited as an oval eccentric layer in potato.

So, the correct answer is option B.