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Часть II.
Задание 1. Прочитайте текст В и ответьте на вопрос: How are
proteins classified?
Text B. Proteins.
1. Foods contain different materials that help your body to stay
strong and healthy. The most important of these are known to be
proteins. They are absolutely necessary for building and
repairing our bodies. Proteins consist of carbon, hydrogen,
oxygen, nitrogen and other elements, such as phosphorus and
sulphur.
2. Proteins are complex in nature, they are built up of smaller units,
the amino acids. Proteins vary in the kind and number of amino-
acids present. Certain amino acids the body is unable to build,
and these essential amino acids must be supplied by the foods
eaten.
3. Variation in the quality of proteins has resulted in their
classification as complete, partially complete, and incomplete,
based upon their ability to support normal growth and to
maintain life. A complete protein is one that is adequate to
support normal growth and to maintain life even if it is the only
protein in the diet. A partially complete protein is one that
maintains life but does not support normal growth. An
incomplete protein, although valuable in the diet, will by itself
neither support normal growth nor maintain life. Most animal
proteins are complete. Plant proteins are more or less
incomplete, although the soya bean and the wheat grain contain
proteins that are complete.
4. Meat, fish, eggs, milk, cheese, nuts, cereals and cereal products
are high in protein. All those foods contain more than one
protein. Milk, for example, contains the proteins lactalbumin and
casein, as well as others of lesser importance.
5. Proteins 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.
Задание 2. Прочитайте текст еще раз и запишите № абзаца, в
котором содержится информация о том, что возникновение
жизни возможно связано с образованием белков.
Задание 3. Просмотрите текст еще раз, отметьте номера
предложений, которые соответствуют содержанию текста:
1. Proteins are found in foods of both animal and plant origin.
2. The importance of proteins is shown by the fact that they are
associated with the beginning of life on our planet.
3. The text considers only proteins of the vegetable kingdom.
4. Most proteins contain only carbon and nitrogen.
5. The chief function of proteins in our lives is to produce energy.
6. The body’s need for building and repairing tissues is primarily
met by proteins.
7. The composition of proteins is varied and complex.
Часть II. 4. Meat, fish, eggs, milk, cheese, nuts, cereals and cereal products
Задание 1. Прочитайте текст В и ответьте на вопрос: How are are high in protein. All those foods contain more than one
proteins classified? protein. Milk, for example, contains the proteins lactalbumin and
casein, as well as others of lesser importance.
Text B. Proteins. 5. Proteins make up the vital part of that essential jelly material of
the living cell – the protoplasm. The beginning of life on this and
1. Foods contain different materials that help your body to stay perhaps a few other planets must have been associated with the
strong and healthy. The most important of these are known to be formation of proteins. This word means “to take first place”, for
proteins. They are absolutely necessary for building and there is no life without proteins.
repairing our bodies. Proteins consist of carbon, hydrogen,
oxygen, nitrogen and other elements, such as phosphorus and Задание 2. Прочитайте текст еще раз и запишите № абзаца, в
sulphur. котором содержится информация о том, что возникновение
2. Proteins are complex in nature, they are built up of smaller units, жизни возможно связано с образованием белков.
the amino acids. Proteins vary in the kind and number of amino-
acids present. Certain amino acids the body is unable to build, Задание 3. Просмотрите текст еще раз, отметьте номера
and these essential amino acids must be supplied by the foods предложений, которые соответствуют содержанию текста:
eaten.
3. Variation in the quality of proteins has resulted in their 1. Proteins are found in foods of both animal and plant origin.
classification as complete, partially complete, and incomplete, 2. The importance of proteins is shown by the fact that they are
based upon their ability to support normal growth and to associated with the beginning of life on our planet.
maintain life. A complete protein is one that is adequate to 3. The text considers only proteins of the vegetable kingdom.
support normal growth and to maintain life even if it is the only 4. Most proteins contain only carbon and nitrogen.
protein in the diet. A partially complete protein is one that 5. The chief function of proteins in our lives is to produce energy.
maintains life but does not support normal growth. An 6. The body’s need for building and repairing tissues is primarily
incomplete protein, although valuable in the diet, will by itself met by proteins.
neither support normal growth nor maintain life. Most animal 7. The composition of proteins is varied and complex.
proteins are complete. Plant proteins are more or less
incomplete, although the soya bean and the wheat grain contain
proteins that are complete.
