Vitamin B1 is also known as
- A.Riboflavin
- B.Thiamin
- C.Retinol
- D.Tocopherol
Correct answer
Explanation
The correct answer is B, Thiamin. Vitamin B1 is the chemical called thiamin (also spelt thiamine), the first of the B-complex vitamins to be identified.
Thiamin is a water-soluble vitamin that helps the body turn carbohydrates into energy and keeps nerves and the heart working properly. A long shortage causes beriberi, with weakness, nerve damage and swelling. The disease was common where people ate mostly polished white rice, because polishing removes the thiamin-rich outer layer. Whole grains, pulses, nuts and pork are good sources. Since the body stores little thiamin, it must come from food regularly.
A is wrong because riboflavin is vitamin B2, whose lack causes cracks at the corners of the mouth. C is wrong because retinol is vitamin A, needed for vision. D is wrong because tocopherol is vitamin E, an antioxidant.
Exam tip: B1 thiamin (beriberi), B2 riboflavin, B3 niacin (pellagra), B12 cobalamin (anaemia).
Practice Questions
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- A.1,2 and 3
- B.2 and 4
- C.1 and 3 only
- D.1 only
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- A.Joule
- B.Watt-hr
- C.Newton-metre
- D.kg-metre/sec²
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- A.Magnesium
- B.Zinc
- C.Aluminium
- D.Lead
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Read the full explanation →In an electric circuit, a wire of resistance 10 Ω is used. If this wire is stretched to a length double of its original value, the current in the circuit would become :
- A.half of its original value.
- B.double of its original value.
- C.one-fourth of its original value.
- D.four times of its original value.
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Read the full explanation →Which one of the following scientists mentioned that an electron in an atom could revolve in certain stable orbits without the emission of radiant energy ?
- A.Ernest Rutherford
- B.J.J. Thomson
- C.Niels Bohr
- D.Albert Einstein
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