would you please answer these questions ? Which of the following best describes
ID: 54385 • Letter: W
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would you please answer these questions ?
Which of the following best describes the purpose of creating a ring of light from the condenser lens in a phase contrast microscope, To increase the brightness of the field of view To decrease the brightness of the field of view To increase the phase shift of light that passes through the specimen. To decrease the phase shift of light that passes through the specimen. None of the above The area of study that derives from the concept that the organism is sick because its cells are sick is known as: Epidemiology Pathology Physiology Epistemology Cell Biology Formaldehyde is useful as a fixative for microscopy sample preparation because: It removes water from the sample, allowing tissue spaces to be filled with other materials conducive to tissue sectioning. It reacts with amino groups in proteins, cross-linking them into an insoluble network. - It reacts with fatty acids, leading to preservation of the sample's cellular membranes? Cells are not killed when immersed in It stains the tissue, binding to macromolecules-. Which of these amino acids causes a kink in the primary structure of a protein? x leonine argentine aspartic acid prolife cytosine All of the following statements about fluorescence are true EXCEPT: Once light is absorbed, some electrons reach an excited stated then return to ground state and release some energy in the form of light. Proteins have been found that are naturally fluorescent. The color of the light which is emitted from as ample is the same as the color of light which the sample has absorbed) Both the illumination and emission occur through the objective lens of the microscope. A diachronic filter helps to separate the excitation and emission light paths.Explanation / Answer
31. Option -D. To decrease the phase shift of light that passes through the specimen
32. Option b - Pathology
33. Option B - It cross links the protein by reacting with amino group.
34. Option D - Proline - Due to its hydroxyl group in the side chain.
35. Option D - Both Illumination and emission do not occur in the objective lens of microscope
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