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Why are vitamin C essential to us ? Give...

Why are vitamin `C` essential to us ? Give their important sources.

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The correct Answer is:
Vitamin `A` is essential to us because its deficiency causes xerophthalmia (hardening of cornea of eye) and night blindness.
Sources : Fish liver oil, carrots, butter and milk.
Vitamin C . Vitamin C is essential to us because its deficiency causes scurvy (bleeding gums) and pyorrhea (loosening and bleeding of teeth)
Sources : Citrous fruits ; arnia, green leafy vegetables.
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RESONANCE-BIOMOLECULES-Advanced Level(Part II)
  1. Why are vitamin C essential to us ? Give their important sources.

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  2. Fill in the blanks A sugar in which an amino group replaces the anom...

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  3. Draw fisher projections for the two D-aldoheptose whose stereorientati...

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  4. How many aldohetoses are three? How many are D-sugars & how many are L...

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  5. Aldoses give positive Tollen's Fehling's and Osazone reactions but fai...

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  6. alpha-glucose is oxidized by HIO(4) more rapidly than its beta-anomer ...

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  7. Reduction of L-glucose with NaBH(4) leads to the same alditol glucose ...

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  8. Hydrogen gas is not obtained when zinc reacts with

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  9. Reduction of D-glucose forms D-sorbitol while that of D-fructose forms...

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  10. Unlike glucose, neither alpha nor beta-methyl glucoside reduces Tollen...

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  11. (+)-Glucose overset(Ac(2)O)rarr (A) +B overset(AgNO(3)//NH(4)OH)rarr (...

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  12. Both glucose and fructose are reducing sugars but sucrose is non reduc...

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  13. Why is D-fructose used for sweetening cold drinks but not hot ones?

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  14. What would be the molecular formula of (+)-sugar if C-1 of glucose is ...

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  15. When (+) sucrose is hydrolysed, the D-glucose mutarotates downward to ...

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  16. Glucose and glycine.

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  17. Glucose and fructose

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  18. R-underset(NH(2))underset(|)(CH)-COO^(-)overset(HCI(aq))rarr

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  19. R-underset(.^(+)NH(3))underset(|)(CH)-COOH overset(NaOH(aq))rarr

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  20. HOOC-CH(2)-underset(.^(+)NH(3))underset(|)(CH)-COOH overset(NaOH(aq))r...

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  21. .

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