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VI. Ask questions to the underlined words and word-combinations.

1. Scientists have studied protoplasm under high-powered microscopes.

2. The vegetation in these regions shows relatively large accumulation of it.

3. All the living parts of the cell are made of protoplasm.

VII. Agree or disagree with the following statements.

  1. Scientists have paid much attention to the studying of protoplasm.

  2. The chemical analysis of protoplasm is usually a success.

  3. Protoplasm consists mainly of water.

  4. Five chemical elements make up 98 per cent of protoplasm.

  5. We cannot find any rare chemical elements in the composition of protoplasm.

  6. Protoplasm is a liquid substance which can easily change into a more solid jelly.

VIII. Answer the questions.

  1. How is the jellylike material of the cell called?

  2. Why do the scientists study protoplasm with great care?

  3. What is the chemical nature of protoplasm?

  4. Why is protoplasm the key to a real understanding of life?

IX. Translate into English.

Изучение составных частей клеток и протоплазмы было начато после открытия микроскопа. Под микроскопом ученые увидели маленькие ячейки, которые были названы клетками. Позднее обнаружили протоплазму. Все основные жизненные функции организма заключены в протоплазме. Она состоит из ядра, окруженного веществом, названным цитоплазмой. Химический состав протоплазмы сложный. Ученые долго не могли ее изучить. Когда ученые начинают исследовать ее, она меняет свою структуру и умирает. Но исследования продолжаются, и в настоящее время очень много уже известно о свойствах, структуре и составе протоплазме.

X. Read and translate the text into Russian and then back into English, compare your version with the original:

The phenomena of life are associated with a parti­cular substance called protoplasm, which has definite and specific characteristics. Physically, protoplasm is a grayish jelly-like substance. Its consistency varies with different internal and external conditions from a fluid to a firm jelly. Protoplasm is found within the cells of living orga­nisms. They are the smallest microscopic structural units of life. Chemically it is a complex mixture of many diffe­rent combinations of elements. Analysis of the protoplasm of different kinds of organisms shows that thirty-four elements may enter into its composition.

XI. Read the text and reproduce it in Russian.

The nucleus is a fairly large, generally spherical body located more or less centrally in the cell. It stains in a distinctive manner and includes one or more dense, heavily staining bodies, the nucleoli.

The nucleus is the controlling center of the cell. An enucleated cell, or a cell fragment without a nucleus, can carry on some of its functions for a short period, but its ability to grow is limited and reproduction can not occur. On the other hand, fragments containing a nucleus may grow and may eventually divide. Correlation of observa­tions on inheritance with details of cell structure shows clearly that, with a few exceptions, the factors that control heredity are located in the chromosomes, which lie in the nucleus and make up most of its bulk. The chief compo­nents of these hereditary factors, the genes, appear to be DNA. To a great extent DNA controls cell growth and cell function. RNA performs a function outside the nuc­leus related to the nuclear activity of the chromosomal DNA.