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V. Speaking

1. 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 analysis

  1. Active vocabulary

liquid

рідина

uniformity

однорідність

solubility

розчинність

property

an асти вість

temporary

тимчасовий

analysis

аналіз

qualitative

якісний

quantitative

кількісний

precipitation

осад

assay

проба, аналіз

spectroscope

спектроскоп

electrolysis

електрод і.ч

fluoroscopc

флюроскоп