In metabolic pathways

Options

A. Only complex structures are formed
B. Metabolites are converted into each other through a series of linked reactions
C. Only simple structure are formed
D. The biochemical reactions are catalysed by inoganic catalyst

Answer

### Step-by-Step Solution:

1. **Understanding Metabolic Pathways**:
- Metabolic pathways consist of a series of chemical reactions that occur within a cell. These pathways can be categorized into two main types: anabolic pathways and catabolic pathways.

2. **Anabolic Pathways**:
- Anabolic pathways are responsible for building complex molecules from simpler ones. This process requires energy input. For example, the synthesis of proteins from amino acids is an anabolic process.

3. **Catabolic Pathways**:
- Catabolic pathways involve the breakdown of complex molecules into simpler ones, releasing energy in the process. An example of this is the breakdown of glucose during cellular respiration.

4. **Analyzing the Statements**:
- **Statement 1**: "Only complex structures are formed."
- This statement is **false** because both complex molecules are formed (anabolism) and complex molecules are broken down (catabolism).

- **Statement 2**: "Metabolites are converted into each other through a series of linked reactions."
- This statement is **true**. Metabolism involves a series of interconnected reactions where products of one reaction serve as substrates for the next. For example, glycolysis feeds into the Krebs cycle.

- **Statement 3**: "Only simple structures are formed."
- This statement is **false** because metabolic pathways involve both the formation of complex structures and the breakdown of these structures into simpler ones.

- **Statement 4**: "The biochemical reactions are catalyzed by inorganic catalysts."
- This statement is **false**. Most biochemical reactions are catalyzed by enzymes, which are organic catalysts, not inorganic ones.

5. **Conclusion**:
- The only correct statement is that metabolites are converted into each other through a series of linked reactions. Thus, the correct option is **Statement 2**.