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nmdcat.online June 27, 2026

The requirement for cellulose in the diet of ruminants like cows is met by their symbiotic gut microbes that produce cellulase. The final absorbable end-product of this microbial fermentation that enters the ruminant’s bloodstream is not glucose but mainly

A. Short-chain volatile fatty acids like acetate, propionate, and butyrate
✓
B. Lactate and ethanol
C. Amino acids and peptides
D. Fructose and galactose

📝 Explanation

Rumen microbes ferment cellulose and other carbohydrates to volatile fatty acids (VFAs) like acetate, propionate, and butyrate. These are absorbed through the rumen wall and serve as the primary energy source for the ruminant, not the glucose monomers of cellulose.

📖 Additional Information

  • Short-chain volatile fatty acids like acetate, propionate, and butyrate
  • Lactate and ethanol
  • Amino acids and peptides
  • Fructose and galactose

Rumen microbes ferment cellulose and other carbohydrates to volatile fatty acids (VFAs) like acetate, propionate, and butyrate. These are absorbed through the rumen wall and serve as the primary energy source for the ruminant, not the glucose monomers of cellulose.

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