Question

1. If I view through low power objective 10x and ocular 4x, what is the total magnification of the microscope?

2. You have to study the detailed structure of a cell, which objective will be best to view it. Scanner, low power or high power, and why?

3. You are counting red blood cells, which objective will be best to count the number of cells, high power or low power objective, and why?

4. You see chromosomes lined up in the center of the cell. Which stage/phase of mitosis is it in?

5. You see sister chromatids moving towards the pole. Which stage/phase of mitosis is it in?

Answer 1

1. If a slide is viewed through a low power objective of 10x and ocular of 4x, the total magnification can be calculated thus:

Total magnification = objective magnification x ocular magnification

                                  = 10 x 4

                                       = 40

2. In order to study the detailed structure of a cell, a high-power objective comes highly recommended. This is because the high-power objective will magnify the essential details of the cell and enables the detailed structure of the cell to be seen.

3. In order to count red blood cells in a blood sample, an objective with a large field of vision comes highly recommended. The higher the magnifying power of an objective, the lower the field of vision. Thus, a low power objective would be the best for counting the red blood cells in a sample.

4. The stage at which chromosomes line up in the center of the cell during mitosis is the metaphase. Mitosis consists of 4 essential stages which are:

• prophase: the stage at which the genetic materials in the cell condenses and become visible as chromosomes under the microscope.
• metaphase: the chromosomes line up at the center or the equator of the cell while spindle fibers engage each chromosome at the kinetochore of the centromere
• anaphase: chromosomes are pulled apart and separated into sister chromatids as a result of the shortening of the spindle fibers. Further shortening of the spindle fibers kick-starts the migration of sister chromatids towards the opposite ends of the cell.
• telophase: sister chromatids complete their migration to the poles. The chromosomes decondense and the cytoplasm of the cell divides in a process known as diakinesis.

5. with reference to the explanation above, the stage of mitosis at which one would see sister chromatids moving towards the pole would be the anaphase.

More on mitosis can be found here: https://brainly.com/question/12479053