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Vocabulary

Application, agriculture, biodegradable, domestication of plants, vegetable oil, biofuels, transgenic plants, genetic cures, enzymes, biological weapons, industrial biotechnology, bioeconomy.

Task. Correcting mistakes.

  1. Correct mistakes in these sentences.

  1. At the weekend I’m usually go swimming.

  2. Are you enjoy the party?

  3. We can’t play tennis because it rains.

  4. Do you can play chess?

  5. How many sisters you have?

  6. I no understand what you’re saying.

  7. What you do tonight?

  8. What time you get home last night?

  9. Last weekend I see some friends and we have a meal.

  10. I’m loving English food. It’s wonderful!

  1. Give the main idea of the text

7-8 Practical lesson

Read and translate the text about objects of biotechnology

Objects of biotechnology

A virus is a small infectious agent that can replicate only inside the living cells of organisms. Most viruses are too small to be seen directly with a light microscope. Viruses infect all types of organisms, from animals and plants to bacteria and archaea. Since the initial discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898, about 5,000 viruses have been described in detail, although there are millions of different types. Viruses are found in almost every ecosystem on Earth and are the most abundant type of biological entity. The study of viruses is known as virology, a sub-speciality of microbiology.

Cells are the fundamental units of living things, from the smallest bacterium to the largest of the plants and animals. Bacteria, the smallest cells, are visible only with the aid of a microscope. The smallest bacteria (Chlamydia and Rickettsia) are only 0.1 to 0.2 um in diameter, whereas larger bacteria may be many microns in length. A newly described species is hundreds of times larger than the average bacterial cell and is visible to the naked eye. Most species, however, are approximately 1 um in diameter and are therefore visible using the light microscope, which has a resolution of 0.2 um. In comparison, animal and plant cells are much larger, ranging from 7 um (the diameter of a red blood cell) to several feet (the length of certain nerve cells).

 Each cell contains the genetic basis for reproduction in its DNA genome, the biochemical machinery for transcribing genetic information into messenger RNA (mRNA) and translating the mRNA into proteins, and the machinery for energy production and biosynthesis, which is all packaged by a membrane. In addition, each cell replicates by cell division. The mechanisms and machinery for accomplishing these functions are basically similar, but the specifics may be different for bacteria and for the higher order organisms. These differences are influenced by the structure of the cell, the environment in which the cell lives, the source and means of the cell's energy production, and the nature of and requirement for cell interaction (or lack thereof).