Multiple Choice Questions on With reference to Vitamin D consider the following statements Vitamin D is needed for a process know........... for UPSC Civil Services Examination (General Studies) Preparation

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Multiple Choice Questions

With reference to Vitamin D consider the following statements Vitamin D is needed for a process know...........

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    With reference to Vitamin D, consider the following statements

    1. Vitamin D is needed for a process known as calcium homeostasis which is the maintenance of a constant concentration of calcium ions in the body.
    2. Vitamin D can be obtained only from the exposure of humans to ultraviolet B (UVB) light.

    Select the correct statement.

    1 only

    Correct Answer

    2 only

    Incorrect Answer

    Both

    Incorrect Answer

    None

    Incorrect Answer
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    Explanation:
    • Vitamin D is needed for a process known as calcium homeostasis which is the maintenance of a constant concentration of calcium ions in the body.
    • Provitamin D3 is a precursor from which humans can make vitamin D. The chemical name of Provitamin D3 is 7-dehydrocholesterol, or 7-DHC. Humans can synthesise vitamin D from 7-DHC when they are exposed to ultraviolet B (UVB) light. Vitamin D3 is also present in fish and dairy products.

    Hence only statement 1st is correct.

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