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a British Zoologist, studied different t...

_______a British Zoologist, studied different types of animal cells and reported that cells had a thin outer layer which is today known as the plasma membrane.

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Theodore Schwann (1939)
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Flow cytometry, illustrated in the figure, is a technique used to sort cells by type. The cells are placed in a conducting saline solution which is then forced from a nozzle. The stream breaks up into small droplets, each containing one cell. A metal collar surrounds the stream right at the point where the droplets seprate from the stream. Charging the collar polarizes the conducting liquid, causing the droplets to become charged as they break off from the steam. A leser beam probes the solution just upstream from the charging collar, looking for the presence of certain types of cells. All droplets containing one particular type of cell are given the same charge by the charging collar. Droplets with other desired types of cells receive a different charge, and droplats with no desired cell receive no charge. The charged. The charges droplets then pass between two parallel charged electrodes where they receive a horizontal force that directs force that directs them into different collection tubes, depending on air charge.

Flow cytometry, illustrated in the figure, is a technique used to sort cells by type. The cells are placed in a conducting saline solution which is then forced from a nozzle. The stream breaks up into small droplets, each containing one cell. A metal collar surrounds the stream right at the point where the droplets seprate from the stream. Charging the collar polarizes the conducting liquid, causing the droplets to become charged as they break off from the steam. A leser beam probes the solution just upstream from the charging collar, looking for the presence of certain types of cells. All droplets containing one particular type of cell are given the same charge by the charging collar. Droplets with other desired types of cells receive a different charge, and droplats with no desired cell receive no charge. The charged. The charges droplets then pass between two parallel charged electrodes where they receive a horizontal force that directs force that directs them into different collection tubes, depending on air charge. Another way to sort the droplets would be to given each droplet the same charge, then vary the electric field between the deflection plates. For the apparatus as sketched, this technique will not work because

Cell wall is a living quasifluid structure forms an outer covering for the plasma membrane of fungi and plants

_____is type of protein, which forms big size pores in pigment cells, Mitochondria and cell membrane of bacteria.

ALLEN -CELL : THE UNIT OF LIFE-Nucleus
  1. a British Zoologist, studied different types of animal cells and repor...

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  2. The interphase has highly extended and elaborate nucleoprotein fibres ...

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  3. What is the name of basic protein present in chromatin?

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  4. What is the approximate length of DNA in a single human cell?

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  5. Which constriction is essentially present in every chromosome?

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  6. Other name of primary constriction is

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  7. Sometimes a few chromosomes have non staining secondary constriction a...

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  8. Nucleus was first described by:-

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  9. Chromatin name was give by:-

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  10. Space between the two parallel membrances of nucleus is called:-

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  11. The outer membrane of nucleus usually remains continuous with which ce...

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  12. Nucleolus is a main site for synthesis of:-

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  13. Give the name of two matrue eukaryotic cells that lack nucleus:-

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  14. Diameter of space between two parallel membrances of nucleus is:-

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  15. The spherical structure present in the nucleoplasm is:

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  16. Metacentric, submetacentric, telocentric and acrocentric chromosomes a...

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  17. Name the type of chromosome which has a terminal centromere:-

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  18. In which chromosome the centromere is situated close to its end formin...

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  19. In which chromosome, centromere is situated middle of chromosome and f...

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  20. Nucleus controls the activities of organelles and play a major role in...

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  21. Material of the nucleus is stained by only acidic dye

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