Which of the following is another name for Vitamin K1?
Phylloquinone
Understanding Vitamin K1 and Its Names
Vitamin K is a group of fat-soluble vitamins that are essential for the body's process of blood clotting, bone metabolism, and regulating blood calcium levels. There are different forms of Vitamin K, primarily distinguished by their source and structure.
Forms of Vitamin K
The two main naturally occurring forms of Vitamin K are:
- Vitamin K1 (Phylloquinone): Found primarily in leafy green vegetables and plant oils.
- Vitamin K2 (Menaquinones): Found in fermented foods and produced by bacteria in the gut. Menaquinones include several subtypes, such as MK-4, MK-7, MK-8, and MK-9.
There is also a synthetic form, Vitamin K3 (menadione), though it is typically not used in supplements due to potential toxicity.
Identifying Vitamin K1's Common Name
The question asks for another name for Vitamin K1. Based on the information above, Vitamin K1 is also known by its scientific name, Phylloquinone.
Let's look at the other options provided to confirm they are not Vitamin K1:
- Nicotinic acid: This is a form of Vitamin B3, also known as Niacin. It is a water-soluble vitamin involved in energy metabolism and nerve function. It is not related to Vitamin K.
- Thiamine: This is Vitamin B1, a water-soluble vitamin crucial for energy metabolism and nerve function. It is not related to Vitamin K.
- Riboflavin: This is Vitamin B2, a water-soluble vitamin involved in energy production and cellular growth. It is not related to Vitamin K.
Therefore, the only option that is another name for Vitamin K1 is Phylloquinone.
| Form | Other Name | Primary Source |
|---|---|---|
| Vitamin K1 | Phylloquinone | Plants (Leafy greens) |
| Vitamin K2 | Menaquinones (MK-4, MK-7 etc.) | Fermented foods, Gut bacteria |
Revision Table: Key Vitamins
| Vitamin | Other Name(s) | Type |
|---|---|---|
| Vitamin K1 | Phylloquinone | Fat-soluble |
| Vitamin B1 | Thiamine | Water-soluble |
| Vitamin B2 | Riboflavin | Water-soluble |
| Vitamin B3 | Nicotinic acid, Niacin | Water-soluble |
| Vitamin C | Ascorbic acid | Water-soluble |
| Vitamin D | Calciferol (D2, D3) | Fat-soluble |
| Vitamin E | Tocopherols, Tocotrienols | Fat-soluble |
Additional Information on Vitamin K
Vitamin K is crucial for synthesizing proteins required for blood coagulation. These proteins include prothrombin, factor VII, factor IX, and factor X. Vitamin K acts as a cofactor for the enzyme γ-glutamylcarboxylase, which carboxylates specific glutamic acid residues on these proteins. This carboxylation is necessary for the proteins to bind calcium, which is essential for the clotting cascade.
Beyond blood clotting, Vitamin K also plays a role in bone health by supporting the carboxylation of osteocalcin, a protein important for bone mineralization. Vitamin K deficiency can lead to impaired blood clotting (increased bleeding risk) and potentially affect bone health.
Important Questions from Biomolecules
- Which one of the following statements about fertilizers is not correct?
Which one of the following organelles of mammalian cells is rich in hydrolytic enzymes?
What is the other name for Riboflavin?
Which of the following is an inactivated Vitamin D?
Which vitamin is also known as Thiamin?
