BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Harry Holmes and Ruth Corbet isolated and crystallized vitamin A in 1937.

Detailed explanation-2: -In 1931 Paul Karrer succeeded in extracting vitamin A from cod-liver oil and in determining its composition. Vitamin A is necessary for the body to grow, and one of its components is carotene, which is found in carrots and elsewhere. This was the first vitamin to undergo a mapping of its structure.

Detailed explanation-3: -1931-Seventy-five year ago Paul Karrer successfully isolated Vitamin A from cod-liver oil; it was the first of the vitamins of which the chemical structure was clarified.

Detailed explanation-4: -Casimir Funk in 1913 came up with idea of a “vital amine” in food, originating from the observation that the hulk of unprocessed rice protected chickens against a beriberi-like condition. 5 This “vital amine” or vitamin was first isolated in 1926 and named thiamine, and subsequently synthesised in 1936 as vitamin B1.