Biological value of a dietary protein is based primarily on the proportion of absorbed nitrogen that is:
Correct answer: D. Retained by the animal
- A. Lost in the urine
- B. Excreted in the faeces
- C. Consumed in the feed
- D. Retained by the animal
Explanation
Biological value reflects how effectively absorbed protein nitrogen is retained for tissue synthesis and other body functions. Nitrogen absorbed but later excreted in urine is not counted as retained nitrogen.
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About Animal Nutrition and Feeding
Covers carbohydrates, proteins, lipids, minerals, vitamins and water, along with digestion, absorption and energy metabolism in domestic animals. Questions involve feed evaluation, nutrient requirements, ration formulation, forage and concentrate feeds, deficiency disorders, and the differences between ruminant and monogastric nutrition.
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