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 function of the rumen. The rumen is the first and largest stomach compartment in ruminant animals like cows. It hosts a vast population of symbiotic microorganisms (bacteria, protozoa, fungi).
Step 2: Identify the vitamins synthesized by these microorganisms. These rumen microbes are capable of synthesizing all B-complex vitamins and Vitamin K. The cow then absorbs these vitamins, so they do not need to be supplied in the diet.
Step 3: Evaluate the given options.

Vitamin K: Synthesized by rumen microbes.
Vitamins A, D, and E: These are fat-soluble vitamins that are not synthesized in the rumen. They must be obtained from the cow's diet or through exposure to sunlight (for Vitamin D). \end{itemize} Therefore, Vitamin K is the correct answer.