alleryStart learning →Which vitamins do the bacteria of the large intestine synthesize?
ABiotin, vitamin K, pantothenic acid
BVitamin A, vitamin C, and folate
CVitamin C, vitamin D, and biotin
DBiotin, vitamin K, and vitamin C
Answer & Solution
Correct answer: A. Biotin, vitamin K, pantothenic acid
1. Trillions of bacteria live in the large intestine and are known collectively as the bacterial flora.
2. Most are commensal organisms that do no harm while they stay in the gut lumen.
3. Some of them synthesize vitamins, mainly biotin, pantothenic acid and vitamin K.
4. Any option that adds vitamin C, vitamin A or vitamin D goes beyond that short list.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 23 "The Digestive System", section 23.5 The Small and Large Intestines_
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