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II. Listen to the following piece of information about cellulose. Fill in the missing words or phrases

Cellulose is the (1)____________ of the cell wall of all plant cells. In plants, cellulose is normally combined (2)____________ or gummy substances. With some exceptions among insects, true cellulose is not found (3)____________. Microorganisms in the digestive tracts of (4)____________ break down the cellulose into products that can then be absorbed. Cellulose is insoluble in (5)____________ and may be readily separated from the other (6)____________. Depending on its concentration, sulphuric acid acts on cellulose (7)____________, soluble starch, or amyloid; the last is a form of starch (8)____________ of parchment paper. When cellulose is (9)____________ and then exposed to the fumes of carbon disulfide, the solution (10)____________. Rayon and cellophane are cellulose regenerated from such solutions. (11)____________ are spun into fine filaments for the manufacture of some fabrics and are also used for (12)____________, as a substitute for glass, for the manufacture of safety glass, and as (13)____________. Cellulose ethers are used in paper sizings, adhesives, (14)____________, and (15)____________.

WRITING AND SPEAKING

Write a summary of the text Macromolecules in 200 words using the vocabulary of Lesson 1. Get ready to present it in class


Lesson 2

CELL AS A BASIC UNIT OF LIFE

PRE-READING TASKS

I. Answer the following questions

What meanings of the word cell do you know?

Why do you think the basic unit of life was called the cell?

What do you know about cells as units of life?

II. Listen to the following words and practice their pronunciation

Virus; totipotent; subcellular; micrometer; algae; neuron; prokaryotic; eukaryotic; Monera; nucleus; nuclei; nucleoid; fungus; fungi; plasma membrane; cytoplasm; minute.

READING COMPREHENSION AND VOCABULARY DEVELOPMENT

I. Match each word on the left to its correct definition on the right

1) preexisting, adj 2) fusion, n 3) induce, v 4) intact, adj 5) volume, n 6) projection, n 7) interfere, v 8) remainder, n 9) enclose, v   a) to get involved in a situation where one is not wanted or needed; b) to call forth or bring about by influence or stimulation; c) the part of something that is left; the rest of; d) to surround or fence off; e) a merging of diverse, distinct, or separate elements into a unified whole; f) having no relevant component removed or destroyed; entire; uninjured; g) the amount of space occupied by a three-dimensional object as measured in cubic units; h) something that existed earlier or before; i) something that sticks out from a surface.

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  1. A) COLLOQUIAL WORDS
  2. A. Read the text and decide if the following statements are true or false.
  3. About Lycra Fabric
  4. About My Family
  5. About myself
  6. About Myself
  7. Analyze the meanings of the italicized words. Identify the result of the changes of the connotational aspect of lexical meaning in the given words.
  8. Answer the following questions
  9. Answer the following questions.
  10. Archaic, obsolete and historic words
  11. Arrange the following units into two lexical and two terminological sets. I Give them corresponding names.
  12. Ask your friend questions in English about their content. Summarize his/her answers.




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II. Regard the suffixes enlisted below. What parts of speech are formed by means of these suffixes? Find the words containing such suffixes in the text. What do they mean? | II. Read the following text paying attention to the highlighted words. Explain or interpret the contextual meaning of the underlined phrases

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