Question

Nicotine, the main alkaloid in tobacco is synthesized in plants by:

• A. Stem
• B. Leaves
• C. Roots
• D. All of the above

Answer 1

The correct option is C

Roots

The correct option is C

Explanation of the correct option:

1. The mechanical wounding stimulates nicotine synthesis in tobacco plants.
2. After using the tobacco plant, the roots synthesize a large amount of nicotine, which is transported to the shoot.

Explanation of the incorrect options:

Option A:

1. The main function of stems is to conduct water and minerals from the roots to other parts of the plant.
2. Stems also store food and stems can also synthesize their food through the process of photosynthesis.

Option B:

1. The leaves have a green pigment called chlorophyll.
2. It helps the leaves capture the energy of the sunlight.
3. This energy is used to synthesize food from carbon dioxide and water.

Final answer: Nicotine, the main alkaloid in tobacco is synthesized in plants by roots.