Question

Vitamin that is synthesized in the cow's rumen is

• A. Vitamin K
• B. Vitamin A
• C. Vitamin D
• D. Vitamin E

Hint:

Remember that the microorganisms in a cow's rumen are a "vitamin factory", producing all the B vitamins and Vitamin K. The cow only needs to worry about getting fat-soluble vitamins A, D, and E from its food.

Answer 1

The Correct Option is A

Step 1: Understand the rumen's function.The rumen, the largest compartment of a ruminant's (e.g., cow) stomach, contains symbiotic microorganisms (bacteria, protozoa, fungi).
Step 2: Identify vitamins synthesized by rumen microorganisms.Rumen microbes synthesize all B-complex vitamins and Vitamin K. Consequently, cows absorb these vitamins, eliminating the need for dietary supplementation.
Step 3: Evaluate the options.

Vitamin K: Rumen microbes synthesize it.
Vitamins A, D, and E: These fat-soluble vitamins are not synthesized in the rumen and must come from diet or sunlight (Vitamin D).\end{itemize}Therefore, Vitamin K is the correct answer.