In the herbivores, cellulose is digested because of:
Correct answer: D. Bacteria, Yeasts, and Protozoa
- A. Bacteria
- B. Yeasts
- C. Protozoa
- D. Bacteria, Yeasts, and Protozoa
Explanation
In herbivores, the digestion of cellulose is primarily facilitated by bacteria and protozoa present in their digestive systems. These microorganisms produce enzymes that break down cellulose into simpler sugars, which the herbivores can then absorb. Bacteria and protozoa are critical for this process, residing in the rumen or cecum of animals like cows and sheep. Although yeasts are not primarily involved in cellulose digestion, they might contribute minimally. Therefore, the correct answer is Option D: Bacteria, Yeasts, and Protozoa. Options A and C are partially correct because they include either bacteria or protozoa, but not both. Option B, involving yeasts, is incorrect as yeasts are not major contributors to cellulose digestion.
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The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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