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.

VI. Speaking

Work with a partner. Here are his answers. Ask him questions.

- _________________________________________________________________?

- Organic chemistry is the chemistry of the compounds of carbon.

- _________________________________________________________________?

- The three biggest classes, of the organic compounds.are proteins, carbohydrates and lipids.

- ________________________ _________________________________________?

- Proteins are made of many ami no acids linked together. Amino acids are compounds having both the properties of amines and acids.

- _________________________________________________________________?

- The amino acids essential for human, equlibrium are: isoleucine, leucine, lysine, methionine, phenylanine, theonine, and valine.

- ___________________________________________________________________?

- Proteins are separated into groups based chiefly on physical properties (solubility, coagulation, precipitation). These groups are: albumins, globulins, prolamines, nucleo-proteins, phosphoroproteins (casein in milk), albuminoids, chfo.moproteios (color of hemoglobin).

- ____________________________________________________________________?

- The most important carbohydrates..are sugars, starches, and cel­luloses.

- _____________________________________________________________________?

- A common simple sugar is glucose, a primary, product of photosynthesis, present in ©very plant ceil.

- ______________________________________________________________________?

- Ordinary sugar, (cane-sugar, beet-sugar) is sucrose. The molecules of it are found in plants (wheat, maize, barley, carrots, sugar beet) in most fruits and leaves of many plants.

- _______________________________________________________________________?

- One of the three large classes of.substances in, foods and living cells, lipids contain more than twice as much energy (calories) pet unit of weight as the other two (proteins and carbohydrates).

Chemical compounds.

Хімічні сполуки.

I. Active vocabulary.

rhubarb – ревінь;

vinegar – оцет;

derivation – походження;

sour – кислий;

hydrochloric – соляний;

significant – значний;

to neutralize – нейтралізувати;

particle – частка;

to stipulate – обумовлювати;

digestion – травлення;

slippery – слизький;

property – властивість;

to vanish – зникати.

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