Why are some molecules called bioactive molecules ? Give two examples of such molecules.

Explanation

**Step-by-Step Solution:**

1. **Definition of Bioactive Molecules:**
Bioactive molecules are compounds that are produced by living organisms and have an effect on the metabolism or biological processes of other organisms. They can influence various physiological functions and are often involved in signaling pathways.

2. **Functionality:**
These molecules can modify the metabolic processes in other organisms, meaning they can enhance, inhibit, or alter biological activities in those organisms. This is why they are considered bioactive; they have a biological effect beyond their own organism of origin.

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