Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
Ластовка, Зубкова print.doc
Скачиваний:
10
Добавлен:
01.07.2025
Размер:
4.12 Mб
Скачать

IV. Answer the following questions to check how carefully you have read the text:

1. Does the environment we live cause genetic mutations?

2. What can dangers from the environment increase?

3. What is called a mutagen?

4. What are man-made chemicals that we may ingest?

5. Who reported that X-ray could induce mutations in Drosophila? When?

6. What is mutagenesis?

7. What is spontaneous mutagenesis?

8. What is a mutant?

9. What are the types of mutagens?

10. How can physical mutations of DNA be caused?

11. In what way does ionizing radiation affect DNA?

12. How does ultraviolet radiation induce mutations?

13. What is the harmful effect of certain mineral fibres?

14. What are the examples of chemical mutagens?

15. What viral mutagens do you know?

16. What does helicobacter pylori induce?

Vocabulary exercises

I. Complete the following to make suitable sentences according to the text:

1. The environment we live in has …

2. The quality of water we drink and the air we breathe …

3. There are over 70,000 man made chemicals …

4. Many natural compounds that may occur in …

5. H. J. Muller (1927) reported that …

6. If mutagenesis occurs in nature without the addition of a known mutagen, …

7. Mutagens are of three types: …

8. Physical mutation of DNA can be caused by …

9. Ionizing radiation literally punches …

10. Ionizing radiation can come directly from …

11. Certain natural mineral fibres like …

12. In the case of chemical mutagens, …

13. Viral mutagens may use …

14. Helicobacter pylori is …

II. Give the Ukrainian for:

a real impact; to experience genetic mutations; the quality of water; to affect the integrity of DNA; to increase our chances; an environmental agent; man made chemicals; potential mutagens; the process of producing a mutation; a known mutagen; either the base sequence of DNA or the phenotype; ionizing radiation; to act in very different ways; the correct genetic sequence; certain portions of DNA; because of their size; carcinogenic mutations; found in cigarette smoke; the plastics industry; over-cooked foods; stomach cancer.

III. Give the English for:

повітря, яким ми дихаємо; може дійсно впливати на; виправляти будь-які помилки; загроза від навколишнього середовища; добриво; які ми можемо ковтати; багато природних сполук; велика кількість чинників; спонтанні мутації; фізичні мутагени; ультрафіолетове випромінювання; певні мінеральні волокна; шкодити безпосередньо ДНК; чужорідні молекули; приклади хімічних мутагенів.

IV. Insert the missing letters and translate the following words:

m…ta…en, p…sti…ides, i...pa...t, sto...ac..., ...iral, m...uld, pa...il...oma, ex...eri...nce, h...p...titis, ...he…ical, co…mi…, …heno…ype, b…ea…he, u…t…avi…let, c..lor…de, …ro…oph…la, …aus…, …est…ide, af..e…t, f…rei…n, …isr…ad.

V. Make up questions of your own using the following words:

man made chemicals, the integrity, our bodies, different cancers, helicobacter pylori, three types, the human T-cell lymphocytic virus, natural mineral fibres, a mutagen, cigarette smoke, X-rays, a risk factor, biological mutagens.

VI. Look through the text and decide whether the following true or false:

1. Our bodies are not designed to correct any mistakes.

2. Viruses that can be a risk factor for different cancers.

3. A mutant is an organism in which the base sequence of DNA has been changed.

4. An environmental agent that causes cell division is called a mutagen.

5. Spontaneous mutagenesis occurs in nature without the addition of a known

mutagen.

6. H. J. Muller (1927) reported that cosmic rays could induce mutations in

Drosophila.

7. The integrity of our DNA can not be influenced by the air we breathe.

8. Fertilizers, preservatives, pesticides, herbicides, drugs, etc. are examples of

chemical mutagens.