Question

4. Choose the microscopy technique that would best fit the needs of each scenario.

Scenario 1: Scientists are attempting to identify the specific type of leukemia a person has based on cell surface structures. ___

Scenario 2: Researchers are studying chemotaxis in white blood cells. Chemotaxis is the movement of living cells in response to a particular substance. ___

Scenario 3: Cell biologists are interested in measuring the distance between the inner and outer nuclear membranes, and need an instrument capable of producing images where the tiny distance between these two membranes is clear. __

Answer 1

Answer: Scenario 1: SEM

Scenario 2: Light

Scenario 3: TEM

Explanation:

Answer 2

The technique applied to observe and analyze objects that cannot be seen with the bared eye is called the microscopic technique.

1. The technique used will be SEM. A scanning electron microscope (SEM) is used to generate an image on the individual surface with the help of electron lasers.

• It is useful in apprehending cell surface fabrication and topography.

• Therefore, to study the cell surface structure of leukaemia SEM is best.

2. The light microscopy technique can be applied to study chemotaxis.

• When there will be a movement in the living cell due to response towards chemical then the light microscope can be used to visualise the cells.

• Therefore to study chemotaxis light microscopy should be employed.

3. The transmission electron microscope (TEM) method can be used to know the gap between the inner and outer layers. They are used for observing very thin segments of specimens.

• Through the thin fragments, the electron flows easily and the image is produced.

• Therefore, TEM should be used by scientists to measure the distances.

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