«Proteins and protoplasm»

1. Письменно переведите текст на русский язык.

Proteins represent the stream¹ of life. They make up the vital part of that essential jelly material of the living cell – the protoplasm. The beginning of life on this and perhaps a few other planets must have been associated with the formation of proteins. This word means “to take first place”, for there is no life without proteins. If you would like to see proteins, look over your own body, or you can look at one that is practically pure, that is the white of an egg, which is almost all protein or albumen and water. Usually these lost essential of life’s materials have the indefinite and glue-like form known as a colloid though some of them have been separated as pure and definite crystals. Though the detailed² structures of the molecules are complex, there are only a few chemical elements which enter into their composition. Most proteins contain 51 to 55 per cent carbon, about 7 per cent hydrogen, 20 to 23 per cent oxygen, 15.5 to 18.7 nitrogen, 0.3 to 2.0 per cent sulphur. Some of them also contain a little phosphorus or iron. Nature makes some tremendous structures out of these few materials.

1 – течение, основа

2 – мельчайший

Кратко расскажите по-английски:

а) о составе белков;

б) о принципе классификации белков и их характеристике.

UNIT5

« VITAMINS »

Active Vocabulary:

vitamin- витамин;

health– здоровье;

well-being– здоровье, благосостояние;

to expose, exposure– подвергать, выдержка;

to aid, aid– помогать, способствовать, помощь;

to constitute, constituent– составлять, составная часть;

to destroy– разрушать, уничтожать,

destruction- разрушение,

destructive- разрушительный;

available- доступный;

extent– степень, мера;

to exceed - превышать;

to remain - оставаться,

to recognize - признавать,

to convert (to transform, to change into, to turn into) – превращать, обращаться,

to affect (to influence, to act upon, to have effect) – влиять, затрагивать,

to prevent - предотвращать;

to occur (to happen, to take place) – происходить, случаться;

stable - устойчивый;

readily – охотно, легко

Notes

yeast; alkali		дрожжи; щелочь
egg yolk; carotene		яичный желток; каротин
ergosterol		эргостерин

reproduction; fertility		воспроизводство; плодородие
clotting of blood		свертывание крови
ultra-violet light		ультрафиолетовый свет

PRE-TEXT EXERCISES

1. Переведите на русский язык данные словосочетания.

to be exceedingly important; generally recognized as; still remains the best source; to occur as such; to any appreciable extent; to be especially stable to; to be really a "stored sunshine" in food; due to the presence of a fat-like substance; under direct exposure to the sun or ultra-violet light ;unlike most of the other vitamins; like the other fat-soluble vitamins; to be easily/readily destroyed; thus transformed into the vitamin; to have little effect upon vitamin K; to go on oxidizing.