Bacteria in the large intestine of man are important in the?

A. synthesis of vitamins K and B2
B. digestion of vegetables
C. synthesis of vitamins A and D
D. absorption of water

Correct Answer:

Option A – synthesis of vitamins K and B2

Explanation

Bacteria in the large intestine also make some important substances, such as vitamin K (see Vitamin K), which plays an important role in blood clotting.