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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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Bacteria in the _________ make essential vitamins.

  1. a. stomach
  2. b. small intestine
  3. c. colon
  4. d. esophagus

Summary Introduction

Introduction: The colon is a part of the large intestine where the digestive processes of the body ends. Its main functions are absorbing water, electrolytes, and essential vitamins such as vitamin K. Some normal inhabitants of our body are harbored in the colon and produce certain essential vitamins such as thiamine, riboflavin, vitamin B12, and vitamin K.

Explanation

Reason for the correct answer:

Digested food materials undergo fermentation and are converted to feces inside the large intestine. The gut flora react with the feces and break down fiber to release different chemicals for its sustenance and, as byproducts, produce vitamins like vitamin B12 and vitamin K.

Option c. is given as “colon”. The bacterial consortium present in the colon of the large intestine produces many essential vitamins that are absorbed by the cells present in the colon. Hence, the correct answer is option c.

Reasons for the incorrect answers:

Option a. is given as “stomach”. The stomach is a main part of the body, where the partial digestion of food takes place. The enzymatic and acidic activity of the stomach breaks down the food. Bacteria cannot grow in the stomach because of its acidic condition...

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