Biological response produce by the drugs when

Options

A. It interacts with micromolecular targets
B. It interacts with macromolecular targets
C. no interaction is possible with any type of molecules
D. it interacts with micromolecules as well as macromolecules

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the conditions under which biological responses are produced by drugs. This means we need to identify how drugs interact with biological systems to elicit a response.

2. **Defining Drugs**: Drugs are defined as chemicals that typically have low molecular mass. They are designed to interact with biological systems to produce a specific effect.

3. **Identifying Targets**: Drugs interact with various targets in the body. These targets can be categorized into two types:
- Micromolecular targets (small molecules, such as enzymes or receptors).
- Macromolecular targets (larger biological molecules, such as proteins, nucleic acids, or complex structures).

4. **Biological Response**: When drugs interact with these targets, they can produce biological responses. A biological response can be therapeutic (helpful) or adverse (harmful).

5. **Analyzing Options**:
- **Option 1**: Interacts with micromolecular targets - While drugs can interact with small molecules, this does not encompass the primary interaction that leads to significant biological responses.
- **Option 2**: Interacts with macromolecular targets - This is the correct option, as most drugs exert their effects by binding to larger biological molecules, leading to a biological response.
- **Option 3**: No interaction is possible with any type of molecule - This is incorrect, as drugs must interact with molecules to produce any response.
- **Option 4**: Interacts with micromolecules as well as macromolecules - While this is true, the primary interaction that leads to a significant biological response is with macromolecular targets.

6. **Conclusion**: Based on the analysis, the correct answer is **Option 2: It interacts with macromolecular targets**.

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