Task 5.Translate the given sentences into Russian, your book and translate them back into English

1. Vitamin is an organic compound required as a nutrient in tiny amounts by an organism.

2. Thirteen vitamins are universally recognized at present.

3. Vitamins are classified by their biological and chemical activity, not by their structure.

4. Vitamins have diverse biochemical functions.

5. The term vitamin was derived from “vitamine”, meaning amine of life.

6. Vitamins are classified as either water-soluble or fat-soluble.

7. Water-soluble vitamins are dissolved easily in water.

8. Vitamins are essential for the normal growth and development of a multicellular organism.

9. Humans must consume vitamins periodically but with differing schedules, to avoid deficiency.

10. Being overdosed, some vitamins may cause side-effects suchas nausea, diarrhea, and vomiting.

Task 6.Retell the text.