I. What is missing? Find the missing adverbs in the reading.
1. It is______ applied to minor disturbances of the stomach...
2. Hence they were____ called filterable viruses.
3. A "live" virus can_______ be reconstituted out of inorganic chemicals.
4. ...when the chromosomes in the nucleus of a living cell split ___ and rejoin to form new cells.
5. The viruses are ___ small...
6. The smallest virus, that of hoof-and-mouth disease, measures ___ 10 millimicrons.
Choose the best word for each sentence. Use each word only once.
fashionable damage bacteriophage nature
originally minor associates nucleus
parasite infective closely configuration
1. “Virus” has also become a ___ medical diagnosis.
2. It is usually applied to ___ disturbances of the stomach…
3. … who noted ___ agents that would pass through a filter that stopped ordinary bacteria.
4. Hence they were ___ called filterable viruses.
5. In 1901 Walter Reed and his ___ found the virus that causes yellow fever in man.
6. Viruses that are parasites on bacteria are called ___ .
7. ____ related to viruses are reckettsia…
8. The exact ___ of the viruses has not yet been settled.
9. The crux of the matter appears to lie in the ___ of the virus…
10. The nucleic acids – chemicals- have a special ___ in their molecular form.
III. Answer the questions.
1. Where do viruses live?
2. What is "the virus" usually applied to?
3. What does this fashionable diagnosis help us explain?
4. When were viruses first discovered?
5. What are viruses that are parasites on bacteria called?
6. What are rickettsia?
7. How can a "live" virus be reconstituted?
8. What is the configuration of the nucleic acids?
9. When do they split apart and then join together again?
10. How do viruses act?
11. How much does the largest known virus measure?
12. In what kinds of shapes do viruses come?
IV. Change the following statements to questions supplying short answers.
Example:These infections are asymptomatic. Are these infections asymptomatic?
1. Serology is cheaper than the other diagnostic tests.
2. It requires a short execution time.
3. Human immunodeficiency virus can damage organs directly.
4. The survival time and comfort of patients will depend greatly on therapies that prevent individual opportunistic infections.
5. Research into such therapies has expanded markedly in the past 5 to 10 years.
6. That filter stopped ordinary bacteria.
7. Viruses come in all kinds ofshapes.
V. Choose the correct word corresponding to the definitions below.
parasite, stomach, fever, protein, chromosome, chemical
1. One of the minute threads in every nucleus in animal and plant cells, carrying genes.
2. Animal or plant living on or in another and getting its food from it.
3. Condition of the human body with temperature higher than usual, especially as a sign of illness.
4. Substance used in, or obtained by, chemistry.
5. Bag-like part of the alimentary canal into which food passes to be digested.
6. Body-building substance essential to good health, in such foods as milk, eggs, meat.
Date: 2016-01-03; view: 927