Which of the following statements is false?

Options

A. Cellulose is the most abundant organic compound in the biosphere
B. Cellulose is an unbranched polymer with `beta`-1,4 glycosidic bonds
C. Rayon and cellophane are chemically similar to cellulose xanthate
D. Cellulose can be digested by the herbivores by `beta`- amylase, produced by glandular cells of theiralimentary canal

Answer

To determine which statement is false, we will analyze each of the four statements provided.

1. **Statement A**: "Cellulose is the most abundant organic compound in the biosphere."
- **Analysis**: This statement is true. Cellulose is indeed the most abundant organic compound found in nature, primarily in the cell walls of plants.

2. **Statement B**: "Cellulose is an unbranched polymer and it has beta 1,4 glycosidic bonds."
- **Analysis**: This statement is also true. Cellulose consists of long chains of glucose units linked by beta 1,4 glycosidic bonds, and it is unbranched.

3. **Statement C**: "Rayon and cellophane are chemically similar to cellulose xanthate."
- **Analysis**: This statement is true as well. Rayon and cellophane are derived from cellulose and are chemically similar to cellulose xanthate, which is a derivative of cellulose.

4. **Statement D**: "Cellulose can be digested by herbivores by beta amylase produced by glandular cells of their alimentary canal."
- **Analysis**: This statement is false. Herbivores do not produce beta amylase; instead, they rely on microbial fermentation in their gut to break down cellulose.

**Conclusion**: The false statement is **Statement D**.