What instruments was necessary before the dna could be found?

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13-01-2018
Biology

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What instruments was necessary before the dna could be found?

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calculista calculista · Answer 1 · 2018-01-19T16:41:51+01:00

Before the dna could be found was necessary the microscope. This invention was the starting point of a great variety of advances in the world of science, which started from the world of Microscopy and also changed the way of seeing the world, from the possibility of studying Bacteria and Microbes (what that led to the Bacteriology) until the analysis of our own blood with the discovery of the Red and White Globules, which supposed a strong advance in the world of medicine.

avantikar avantikar · Answer 2 · 2020-02-22T11:18:50+01:00

Microscopy is a necessary instrument before the DNA could be found.

Further Explanation:

Microscopes are known to enlarge the apparent size of the image. Due to the magnified image, different points in an object can be seen distinctly. Thus, the resolution is increased. In order to perceive the resolution, the image is focused on the retina of the human eye. Photoreceptors (cone cells) on the retina along with neurons form a detection unit of resolution.The types of cells viewed under a microscope have different levels of an organization; therefore, it needs different microscopy to view the structural details of these cells.

For example, observation of nucleus and flagella requires stained specimens to be viewed under a light microscope.Phase-contrast microscopy is used for analyzing different structures of the specimen, with different refractive indexes. Scanning electron microscopy is appropriate for observing the external structures. Different microscopy, therefore, allows a wide range of analysis in the specimen.

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Answer Details:

Grade: High School

Subjects: Biology

Chapter: Biochemical technique

Keywords:

Organization, microscopy, object, photoreceptors, resolution, analyzing, electron microscopy, scanning, external structure, specimen.