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Вопрос № 911574 - Английский язык

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Where is the source of all vitamin A in?
Vitamin A is an unsaturated cyclic alcohol. It is synthesezed by at least three separate processes.
It has been concentrated and isolated from the non-saponiflable to be present in fish oil, both in the free alcohol and in the ester form. The source of all vitamin A is in the carotenoid pigments, the yellow-coloured, compounds occurring in all chlorophyll-containing plants.
In pure form it is a pale yellow oil, soluble in fat solvents, having an ultra-violet absorption spectrum. The ester forms of the vitamin have been found to possess greater stability than the free alcohol.
Варианты ответов
  • It is in a pale yellow oil, soluble in fat solvents.
  • It is in the carotenoid pigments, the yellow-coloured, compounds occurring in all chlorophyll-containing plants.
  • It is in the non-saponiflable to be present in fish oil.
  • It is in an unsaturated cyclic alcohol.
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Вопрос задал(а): Анонимный пользователь, 13 Ноябрь 2020 в 16:10
На вопрос ответил(а): Анастасия Степанова, 13 Ноябрь 2020 в 16:10

Похожие вопросы

Вопрос № 1006851

Vitamin A is an unsaturated cyclic alcohol.
The source of all vitamin A is in the carotenoid pigments, the yellow-coloured compounds occurring in all chlorophyll-containing plants.
In pure form it is a pale yellow oil, soluble in fat solvents, having an ultra-violet absorption spectrum. The ester forms of the vitamin have been found to possess greater stability than the free alcohol.
Прочитайте текст и ответьте на вопрос:
Where is the source of all vitamin A in?
It is in an unsaturated cyclic alcohol.
It is in a pale yellow oil, soluble in fat solvents.
It is in the non-saponifiable to be present in fish oil.
It is in the carotenoid pigments, the yellow-coloured, compounds occurring in all chlorophyll-containing plants.

Вопрос № 1006856

Vitamin A is an unsaturated cyclic alcohol.
The source of all vitamin A is in the carotenoid pigments, the yellow-coloured compounds occurring in all chlorophyll-containing plants.
In pure form it is a pale yellow oil, soluble in fat solvents, having an ultra-violet absorption spectrum. The ester forms of the vitamin have been found to possess greater stability than the free alcohol.
Правильным переводом подчеркнутого грамматического явления является …
поросята
пигмент
поросенок
пигменты

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Вопрос № 911575

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What are Vitamin B1, Vitamin B2, Vitamin B6, Vitamin B12, Vitamin С and other stated to belong to?
Vitamin B1, Vitamin B2, Vitamin B6, Vitamin B12, Vitamin С and other are stated to belong to the water-soluble vitamin class. Vitamin B2 (riboflavine) is built up from a ribose and isoalloxazine residue, the name riboflavine being derived from the sugar component and the intense yellow fluorescence of it’s agucous solution.
They are stated to belong to the intense yellow fluorescence of sugar’s agucous solution.
They are stated to belong to a ribose and isoalloxazine residue.
They are stated to belong to the sugar component.
They are stated to belong to the water–soluble vitamin class.

Вопрос № 911576

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What is vitamin C essential for?
Vitamin С (ascorbic acid) is essential for the normal functioning of living cell and is involved in many enzymatic reactions. It is required for the development of cartilage, teeth and bones, for wound healing and aiding the absorption of iron from the intestin. Gross deficiency causes scurvy.
It is essential for enzymatic reactions.
It is essential for wound healing.
It is essential for the development of cartilage, teeth and bones.
It is essential for the normal functioning of living cell.

Вопрос № 911577

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The National Health Service provides free treatment for residents of Belarus. Visitors may use the service if there are special agreements between their countries and Belarus. Otherwise they are expected to pay.
We have hundreds of doctors and paramedical workers including primary health workers, laboratory assistants and nurses. The fundamental principle of our health service is the preventation of diseases. Prophylaxis is a part of the state policy.
свободное обращение
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Вопрос № 911578

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The public health system of Belarus combines a variety of medical institutions. There are policlinics, hospitals and other curative and preventive institutions operating in towns and cities. Emergency aid is provided by physicians of emergency stations.
Local government authorities provide assistance for the elderly and the disabled.
врачебные учреждения
медицинские институты
медицинские учебные заведения
медицинские учреждения
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