XV. Analyse and translate the following sentences (Subjunctive mood):

1. I should like to begin with a general description of metabolism and then f shall turn to a discussion of the total biochemistry of small organisms such as bacteria and yeasts. 2. Scientists would be delighted to build even the simplest carbohydrate from carbon and water, but nature herself finds that impossible. 3. It is necessary that this equipment undergo a thorough test before putting it into practice. 4. During frosty weather it is important that the water should be drained from pipes which are likely to freeze. 5. It is desirable that all possible doubts concerning the structure of the DNA mojecule should be eliminated. 6. If the reaction involves more than one substance it is not necessary that they should all have the same initial concentration. 7. The first requirement of a good system of classification is that it should be objective and reproducible. 8. The very successes of physics and chemistry have ensured that biology should now present the key problems of the whole of natural science. 9. What would happen provided all the air could be forced out the room? 10. Oxygen is an element of utmost importance to us, all living things would die without it. 11. If the temperature should fall below the boiling point the boiling will immediately cease. 12. It would be incorrect to say that X-rays became available to mankind as the result of an accident. 13. I should like to remind that bionics is a very large subject and one which is growing rapidly. 14. It would be a great mistake to believe that a living biologically homogeneous tissue can be compared with ordinary physically homogeneous substance. 15. There is no telling whether the evolution of life on different "inhabitable" planets takes the same track as it did on our Earth. The study of life in different worlds would contribute essentially to our understanding of the evolutionary process. 16. The bee is an insect. This means that its body looks as if it were cut out through in two pieces. The word "insect" means "cut into". 17. Biology now touches the physical sciences at so many points that it would be difficult for anyone who has worked in the latter not to have had some practical contacts with biological topics, 18. Provided the problem of air and water could be solved, life on the Moon would be possible. 19. Enzymes do not alter the equilibrium point of a balanced reaction, provided the same intermidiate products are formed as during the action of some other catalyst. 20. It is desirable that the biophysical investigation of the neuron be not limited to bioelectric processes, but be systematic and exhaustive. 21. It is essential that the substance be chemically pure. 22. Although it is highly important that this cardinal fact be clearly grasped, the science of biology today is not in a position to interpret the responses of organism in these fundamental terms.

1. It would be easy to expand this idea to show how hardly a scientific development of recent years could have been achieved without the aid of mathematics. 2. The disease was due to the lack of a vitamin, and it could tye abolished if milk were added to the diet. 3. Were it not for the action of these helpful bacteria, nitrogen and other valuable element would soon be gone from the soil, and all life on the earth would cease. 4. If the concentration of the enzyme were increased, the rate of the reaction would be changed. 5. If food particles were absent from the water, the bulk of the ameba would gradually diminish. 6. If the cancer had been detected early enough, it would have been destroyed or its growth would have been arrested by treatment. 7. How much more Pasteur would have done in the branch of microbiology if he had lived longer. 8. Never has the advance of Biology been so rapid as it is now. 9. Tryptophone cannot be synthesized by animals and it should- therefore be present in the food, either free or combined as a protein. 10. The very successes of physics and chemistry have ensured that biology should now

present the key problems of the whole of natural science. 11. Should there be no rain, crops will be spoiled. 12. As the plant is a living thing it must have food, or it would die. 13. Some people would pass by common things without notice. 14. Without the sun this world would be a very cold, dark, dreary place. Nothing could grow. No creature could live in it. It would be a dead world. 15. It is essential that all possible preparations should be taken while dealing with these substances. 16. What would happen if all the air could be forced out of the room? 17. Had the checking up of the experimental data not taken so much time, we should have completed our work in accord with the plan. 18. The intention of the present work was to see whether a detailed study of the environment would reveal any regularities of behaviour. 19. You said that you would do this work yourself. 20. He would do this work if you gave him all the necessary information to-morrow. 21. We should adopt the plan to-morrow if you explained it clearly at our meeting. 22. I said that I should support it. 23. I knew that you would do that. 24. I thought that he would agree with me: 25. He said that you would illustrate your report with figures. 26. He would obtain interesting results if he continued his investigation.