BIOMOLECULES AND ENZYMES

BIOLOGY

VITAMINS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The natural, plant-synthesized dietary source of vitamin K is ____
A
Phylloquinone
B
Menaquinone
C
Menadione
D
VItamin K2
Explanation: 

Detailed explanation-1: -Vitamin K1 or phylloquinone is synthesized by plants and is the predominant form in the diet. Vitamin K2 includes a range of vitamin K forms collectively referred to as menaquinones. Most menaquinones are synthesized by human intestinal microbiota and found in fermented foods and in animal products.

Detailed explanation-2: -Vitamin K1, the most common form, is mainly found in plant foods, especially dark leafy greens. K2, on the other hand, is only found in animal foods and fermented plant foods, such as natto ( 3 ).

Detailed explanation-3: -Objective: In humans and other vertebrates, phylloquinone plays the role of a vitamin (vitamin K1) that is required for blood coagulation and bone and vascular metabolism. Phylloquinone from green leafy vegetables and vegetable oil represents the major dietary source of vitamin K for humans.

Detailed explanation-4: -Food sources of phylloquinone include vegetables, especially green leafy vegetables, vegetable oils, and some fruits. Meat, dairy foods, and eggs contain low levels of phylloquinone but modest amounts of menaquinones [4].

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