Essential element(s) as component(s) of energy related chemical compound in plants, is/are :-

Options

A. Only Iron
B. Only Magnesium
C. Only Molybdenum
D. Phosphorus and magnesium

Answer

To answer the question about essential elements that are components of energy-related chemical compounds in plants, we can break down the information provided in the video transcript into a structured solution.

### Step-by-Step Solution:

1. **Understanding Energy in Plants**:
- Plants require energy for various biochemical processes, which is primarily obtained through photosynthesis.

2. **Role of Chlorophyll**:
- Chlorophyll is a pigment essential for photosynthesis. It captures light energy and converts it into chemical energy.

3. **Essential Elements in Chlorophyll**:
- The main component of chlorophyll is magnesium (Mg). Therefore, magnesium is an essential element related to energy in plants.

4. **Formation of Energy-Related Compounds**:
- After photosynthesis, plants produce glucose, which is a carbohydrate. This glucose is then used in cellular respiration to generate energy.

5. **Role of ATP**:
- The energy derived from glucose is stored in the form of ATP (adenosine triphosphate), which is crucial for energy transfer within cells.

6. **Essential Element in ATP**:
- ATP contains phosphorus (P) as part of its structure (adenosine triphosphate). Hence, phosphorus is also an essential element related to energy in plants.

7. **Conclusion**:
- The essential elements that are components of energy-related chemical compounds in plants are magnesium (Mg) and phosphorus (P).

### Final Answer:
The essential elements as components of energy-related chemical compounds in plants are magnesium (Mg) and phosphorus (P).