Storing carbohydrates in the form of polysaccharides has following advantages :

Options

A. (a) during their formation , many molecules of water are removed from monosaccharide ( dehydration synthesis ), condensing the bulk to be stored .
B. (b) when necessary ,polysaccsrides are broken down by enzymes for the release of energy
C. (c) Unike small carbohydrates, polysaccharides are relatively easy to store.
D. (d) All of these

Answer

### Step-by-Step Solution:

1. **Understanding Polysaccharides**: Polysaccharides are large carbohydrate molecules formed by the condensation of many monosaccharide units. They serve as energy storage and structural components in living organisms.

2. **Advantage 1 - Compact Storage**:
- During the formation of polysaccharides, a process known as dehydration synthesis occurs. In this process, water molecules are removed from the monosaccharides.
- This removal of water allows the polysaccharides to condense into a more compact form than individual monosaccharides.
- **Conclusion**: Polysaccharides can be stored in bulk more easily than monosaccharides due to their compact structure.

3. **Advantage 2 - Energy Release**:
- When energy is required by the body, polysaccharides can be broken down by enzymes (like amylase) into monosaccharides.
- This breakdown process releases energy, which is stored in the form of ATP (adenosine triphosphate).
- **Conclusion**: Polysaccharides provide a readily available source of energy when needed.

4. **Advantage 3 - Osmotic Stability**:
- Polysaccharides are generally insoluble in water, which means they do not affect the osmotic balance of cells.
- Unlike smaller carbohydrates, which can dissolve and impact osmotic pressure, polysaccharides remain osmotically inactive.
- **Conclusion**: This property makes polysaccharides easier to store without causing osmotic issues in cells.

5. **Final Conclusion**:
- All the statements regarding the advantages of storing carbohydrates as polysaccharides are true. Therefore, the correct answer is option D, which states that all of these advantages are valid.