BIOLOGY
VITAMINS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Retinol
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Tocopherol
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Naphthoquinone
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None of the above
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Detailed explanation-1: -Vitamin K3 (2-methyl-1, 4-naphthoquinone), also known as menadione, is one such naturally occurring napthoquinone in the body which is necessary for the production of prothrombin and five other blood clotting factors in humans (7).
Detailed explanation-2: -Vitamin K is an example of a naphthoquinone. They have antibacterial and antitumour effects. Naphthoquinones are not widespread but are found in: Bignoniaceae: Kigelia pinnata, Tabebuia spp.
Detailed explanation-3: -Vitamin K is a cofactor used to synthesize coagulation factors in the liver (factors II, VII, IX, and X). Vitamin K-1 is also known as phytonadione and phylloquinone (phytomenadione is the British spelling of phytonadione). Vitamin K2 is also known as menaquinone. Vitamin K3 is known as menadione.