Question
The functionally active form of Vitamin D is:
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
Calcitriol
Vitamin D: Identifying the Active Form
Vitamin D obtained from sunlight or diet exists in precursor forms, such as Cholecalciferol (D3) and Ergocalciferol (D2). These forms are biologically inactive and must undergo metabolic activation in the body.
Vitamin D Metabolism Steps
- Liver Conversion: Precursor forms are first converted in the liver to calcidiol (25-hydroxyvitamin D).
- Kidney Conversion: Calcidiol is then converted in the kidneys to the final active form, calcitriol (1,25-dihydroxyvitamin D).
Calcitriol as the Active Hormone
Calcitriol is the hormonally active form of Vitamin D. It plays a crucial role in calcium absorption from the intestines, bone mineralization, and regulating calcium and phosphate homeostasis. Dehydrocholesterol is a precursor before UV exposure, while Cholecalciferol and Ergocalciferol are intermediate forms requiring further activation.
Therefore, Calcitriol is the functionally active form of Vitamin D.
Was this answer helpful?
Similar Questions
- The attachment site for microtubules that separates chromosomes during cell division:
- The process of synthesizing ATP from ADP and Pi coupled with electron transport chain is:
- Sexual dimorphism is seen in:
- Match the LIST-I with LIST-II
LIST-I LIST-II A. Moss I. Wolffia B. Pteridophyte II. Sequoia C. Gymnosperm III. Selaginella D. Angiosperm IV. Sphagnum
Choose the correct answer from the options given below: - Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: 12-20% acrylamide in PAGE restricts the migration of large molecules.
Reason R: Pore size of the gel affects the separation of molecules.
In the light of the above statements, choose the most appropriate answer from the options given below - Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Spectroscopy technique is used for the study of interaction of electromagnetic radiation with matter.
Reason R: It is used for the identification of substances through the spectrum emitted or absorbed by them.
In the light of the above statements, choose the most appropriate answer from the options given below - Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: The amino acid sequences of Histones H$_3$ and H$_4$ are not highly conserved.
Reason R: Nearly all of the amino acids in a histone molecule are engaged in an interaction with either DNA or another histone.
In the light of the above statements, choose the most appropriate answer from the options given below - Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: X chromosome is acrocentric and Y chromosome is submetacentric.
Reason R: This is based on the position of centromere on the chromosome.
In the light of the above statements, choose the most appropriate answer from the options given below - Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Electron transport chain (ETC) and ATP synthesizing system are located on the inner mitochondrial membrane.
Reason R: The inner surface of the inner mitochondrial membrane possess phosphorylating subunits.
In the light of the above statements, choose the most appropriate answer from the options given below Match the LIST-I with LIST-II
LIST-I LIST-II A. Gas Chromatography I. Separation of ionic solutes B. Affinity Chromatography II. Separation based on size of molecules C. Gel-Filtration Chromatography III. Separation of biomolecules with different binding specificities D. Ion-Exchange Chromatography IV. Separation of volatile components
Important Questions from Mixed Topic (CUET PG)
- Kalpsutra, the illustrated canonical text is from:-
- The Harappan city almost exclusively devoted to craft production was-:
- Mohandas Karamchand Gandhi launched quit India movement after the failure of:-
- The "Objectives Resolution" was introduced in constituent assembly by:-
- Who among the following was not a member of the constituent assembly:-
Need Expert Advice?
Upcoming Exams
GATE
February 06, 2027
Test Series
CUET
CUET PG Psychology (HUQP20) 2026 Mock Test Series
10 Tests
781 Attempts
3.7(15)
English
More Questions from CUET PG
