Cellulose present in the food of grazing animals is

Options

A. Digested by the intestinal bacteria
B. Digested by the animal it self
C. Digested partly by animal and partly by the bacteria
D. Passed out undigested

Answer

To answer the question "Cellulose present in the food of grazing animals is:", we need to analyze the options given and understand the digestion process in grazing animals.

### Step-by-Step Solution:

1. **Understanding Grazing Animals**: Grazing animals, also known as ruminants, include animals like cattle, sheep, goats, and deer. These animals primarily feed on plant materials, which are rich in cellulose.

2. **Cellulose Composition**: Cellulose is a complex carbohydrate that forms the structural component of plant cell walls. It is made up of long chains of glucose molecules linked by beta-1,4-glycosidic bonds.

3. **Digestive Process in Grazing Animals**: Grazing animals have a specialized digestive system that allows them to break down cellulose. Unlike humans, these animals have a unique stomach structure (often with multiple compartments) that facilitates the fermentation of cellulose.

4. **Role of Intestinal Bacteria**: The key to digesting cellulose in grazing animals lies in the presence of specific bacteria in their gastrointestinal tract. These bacteria produce enzymes that can break down cellulose into simpler sugars that the animal can absorb.

5. **Conclusion**: Given the options:
- a) digested by the intestinal bacteria
- b) digested by the animal itself
- c) digested partially by animal and partially by the bacteria
- d) passed out undigested

The correct answer is **a) digested by the intestinal bacteria**. This is because the bacteria present in the digestive system of these animals are responsible for breaking down cellulose.

### Final Answer:
Cellulose present in the food of grazing animals is **digested by the intestinal bacteria**.

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