In potato tubers, reserve food is starch. It is stachyose in Stachys (Chinese artichoke) tu bers. In Jerusalem artichoke (Helianthus tuberosus), the reserve food is in the form of fan shaped crystals composed of

Options

A. starch
B. insulin
C. callose
D. inulin

Answer

To answer the question regarding the reserve food in Jerusalem artichoke (Helianthus tuberosus), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Plant**: The question mentions Jerusalem artichoke, which is scientifically known as Helianthus tuberosus. This plant belongs to the Asteraceae family.

2. **Understand the Reserve Food**: The question specifies that we need to determine the form in which reserve food is stored in the tubers of Helianthus tuberosus.

3. **Recall the Types of Reserve Food**: Common forms of reserve food in plants include starch, sugars, and other carbohydrates. In the case of tubers, we often find starch as the main storage carbohydrate.

4. **Specific Information about Helianthus tuberosus**: Unlike potato tubers that store starch, Jerusalem artichoke tubers store their reserve food in a different form.

5. **Identify the Correct Reserve Food**: The reserve food in Helianthus tuberosus is in the form of fan-shaped crystals. Upon researching, it is known that the reserve food in these tubers is composed of **inulin**, which is a type of carbohydrate.

6. **Conclusion**: Therefore, the correct answer to the question is that the reserve food in the tubers of Jerusalem artichoke (Helianthus tuberosus) is composed of **inulin**.

### Final Answer:
The reserve food in the tubers of Jerusalem artichoke (Helianthus tuberosus) is composed of **inulin**.

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