Question

The Vitamin K2 is known as .......

• A. Mequinone
• B. Phylloquinone
• C. $\alpha$ quinone
• D. $\beta$ quinone

Hint:

A simple memory aid for Vitamin K forms:
- K1 = Phylloquinone (found in foliage plants).
- K2 = Mequinone (bacterial origin fermented foods).
- K3 = Medione (synthetic form).

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Vitamin K is a group of fat-soluble vitamins that play an essential role in blood coagulation, bone metabolism, and cardiovascular health.
It serves as a cofactor for the gamma-glutamyl carboxylase enzyme, which activates blood clotting factors like prothrombin.

Step 2: Detailed Explation:
The Vitamin K group consists of several structurally related forms:
1. Vitamin K1 (Phylloquinone): This is the primary plant-derived form of Vitamin K, found in high concentrations in green leafy vegetables.
It contains a phytyl side chain.
2. Vitamin K2 (Mequinone): This form is primarily synthesized by bacteria in the human gut and is also found in fermented foods (such as tto and cheese) and animal products.
It contains an isoprenoid side chain of varying lengths (desigted as MK-n, e.g., MK-4, MK-7).
3. Vitamin K3 (Medione): This is a synthetic, water-soluble form of Vitamin K that lacks the alkyl side chain and is used in animal feed formulations.
Therefore, Vitamin K2 is chemically identified as Mequinone.

Step 3: Fil Answer
The chemical me for Vitamin K2 is Mequinone.