IV. Language development

1. Complete, the following sentences

1. Organic chemistry is the… .

2. The simplest, organic compounds .... .

3. The carbon atom possesses the property ....

4. The three biggest classes .of the organic compounds are ... .

5. Proteins are made of many ... .

6. The chief groups: of proteins are.... .

7. The most important carbohydrates ... .

8. The carbohydrates are classified ....

9. lucose, a primary product, of photosynthesis,.... .

10. Lipids are any of a diverse class of organic compounds ... .

2. Match each word from column A with its opposite from column B.

A	B
1. chiefly	a. exclude
2. physical	b. insoluble
3. include	c. slowly
4. soluble	d. secondarily
5. rapidly	e. not important
6. primary	f. chemical
7. link	g. bound
8. natural	h. separate
9. together	i. separately
10. free	j. artificial

3. Fill in the words and word combinations from the list, then make sentences using the completed phrases.

organic, internal, linked, food, important, naturally, possesses, insoluble, primary, nervous

1._________________compounds

2._________________the property

3._________________together

4._________________occurring

5._________________reserve

6._________________product

7._________________constituent

8._________________in water

9._________________system

10._________________organs

4. Answer the following questions.

1. What is organic chemistry?

2. What compounds of carbon do you know?

3. What are the three biggest classes of organic compounds?

4. What are proteins?

5. What proteins do you know?

6. What are carbohydrates?

7. What carbohydrates do you know?

8. What are lipids?

9. What are the functions of proteins, carbohydrates and lipids?

GRAMMAR IN USE:

PERFECT TENSES PASSIVE

1. Determine the Perfect Passive in the following sentences. Translate them into Ukrainian.

1. This unusual laboratory has been opened by a very generous person.

2. The results of the test you are holding .in your hands have been prepared by our best students.

3. By the end of the week the obtained enzymes will have been trans­ported to the Head Office in Austria.

4. When we came, the proteins had already been destroyed by the abnormally high temperature.

5. This solution has been infused for a very long time.

6. The active1 constituents of the drugs have been extracted for ten minutes.

7. All these books have been written by our dear colleagues,.

8. When we entered the room, the bottles: with dangerous solutions had: already been broken.

9. Various antibiotics have recently been obtained from molds.

10. Penicillin has had widest use in combating types of infection often resistant to other drugs.

2. Correct the mistakes.

1. Biochemists has also been able to manufacture biological materials such as hormones.

2. Another result of technological advances in chemistry, physics, and biology had been the breakdown of distinctions between these formerly separate disciplines,

3. An even more dramatic result of the growth in chemical knowl­edge was being the expansion of the modern pharmaceutical industy.

4. Techniques has been developed, often requiring catalysts and elabo­rate equipment.

5. This activity will has lead to new dyes and detergents.

6. The early plastics will relied on the large molecules in.cellulose, usually derived from wood pulp.

7. Early plastics, such as Parkesine, developed before 1862, and 'uloid has has little commercial success until the 20th century.

8. We shall had been titrating this solutions for half an hour when you come.