Carbohydrate which is an essential constituent of plants cells is

Options

A. Starch
B. Cellulose
C. Sucrose
D. Vitamins

Explanation

To answer the question regarding the carbohydrate that is an essential constituent of plant cells, we can follow these steps:

### Step 1: Identify the Types of Carbohydrates
Carbohydrates can be classified into simple sugars (monosaccharides and disaccharides) and complex carbohydrates (polysaccharides). In plants, the most significant carbohydrates include starch, cellulose, and sugars.

### Step 2: Understand the Role of Carbohydrates in Plants
- **Starch**: It serves as an energy reserve for plants. However, it is not a structural component of plant cells.
- **Cellulose**: This is a complex carbohydrate that forms the structural component of plant cell walls. It provides rigidity and strength to the plant cells.

### Step 3: Focus on the Essential Carbohydrate
Among the carbohydrates mentioned, cellulose is the primary component that is essential for the structure of plant cells. It is a polysaccharide made up of long chains of glucose units linked by β-1,4-glycosidic bonds.

### Step 4: Conclude the Answer
Therefore, the carbohydrate that is an essential constituent of plant cells is **cellulose**.

### Final Answer
Cellulose is the carbohydrate that is an essential constituent of plant cells.

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