Which of the following is the most abundant carbohydrate in Biosphere?

Options

A. Cellulose
B. Starch
C. Glycogen
D. Chitin

Answer

To determine which carbohydrate is the most abundant in the biosphere, we can analyze the given options step by step.

### Step 1: Understand the Options
The options provided are:
- A) Cellulose
- B) Starch
- C) Glycogen
- D) Chitin

### Step 2: Analyze Each Option
1. **Cellulose**:
- Cellulose is a complex carbohydrate and a linear polymer made up of glucose units.
- It is a major component of plant cell walls and provides structural support.
- It is estimated that cellulose comprises about 33% of all vegetable matter on Earth.

2. **Starch**:
- Starch is a storage polysaccharide found in plants.
- It serves as an energy reserve but is not as abundant as cellulose in terms of overall biomass.

3. **Glycogen**:
- Glycogen is the storage form of glucose in animals and fungi.
- While it is important for energy storage, it is not as prevalent in the biosphere compared to cellulose.

4. **Chitin**:
- Chitin is a structural polysaccharide found in the exoskeletons of arthropods and the cell walls of fungi.
- It is the second most abundant carbohydrate in the biosphere but still less abundant than cellulose.

### Step 3: Conclusion
Based on the analysis, cellulose is the most abundant carbohydrate in the biosphere due to its significant presence in plant cell walls and its contribution to the overall biomass of the planet.

### Final Answer
The most abundant carbohydrate in the biosphere is **A) Cellulose**.

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