BACE Microscopy and Imaging Techniques

Question 1

What is the total magnification when using a 10x eyepiece with a 40x objective lens on a compound microscope?

Accepted Answer

400x

Answer

50x

Answer

4x

Answer

4000x

Question 2

Which type of microscopy uses fluorescent dyes or proteins to visualize specific cellular structures?

Accepted Answer

Fluorescence microscopy

Answer

Bright-field microscopy

Answer

Phase-contrast microscopy

Answer

Dark-field microscopy

Question 3

What is the purpose of immersion oil used with a 100x oil-immersion objective lens?

Accepted Answer

To increase resolution by eliminating refractive index differences between the lens and slide

Answer

To lubricate the objective lens

Answer

To stain the specimen for better visibility

Answer

To cool the objective lens during use

Question 4

Which microscopy technique is most suitable for observing live, unstained, transparent specimens?

Accepted Answer

Phase-contrast microscopy

Answer

Bright-field microscopy

Answer

Electron microscopy

Answer

Confocal microscopy

Question 5

What does the term 'resolution' refer to in microscopy?

Accepted Answer

The minimum distance between two points that can be distinguished as separate

Answer

The total magnification of the microscope

Answer

The brightness of the image

Answer

The depth of field of the objective lens

Question 6

Which staining technique uses crystal violet and iodine to differentiate bacteria into two groups based on cell wall structure?

Accepted Answer

Gram staining

Answer

Acid-fast staining

Answer

Giemsa staining

Answer

Hematoxylin and eosin staining