Question: Which of the following types of microscopes is capable of generating a three-dimensional image of a specimen?

A) differential interference contrast

B) confocal

C) scanning electron

D) Both B and C are correct.

E) A, B, and C are correct.

Answer: A, B, and C are correct.

Question: Which of the following is an incorrect pairing?

A) numerical aperture: curved glass

B) simple microscope: Leeuwenhoek

C) electron beams: shorter wavelength D) magnification: refraction of radiation E) contrast: staining techniques

Answer: numerical aperture: curved glass

Question: Empty magnification results from increasing magnification without increasing the

A) curvature of the lens.

B) refraction.

C) wavelength.

D) resolution.

E) focal point.

Answer: resolution.

Question: If you were trying to visualize flagella without staining, which microscope would you use?

A) phase-contrast

B) bright-field

C) fluorescent

D) dark-field

E) confocal

Answer: phase-contrast

Question: All of the following are associated with an electron microscope EXCEPT:

A) magnetic fields.

B) a prism.

C) an electron beam.

D) a vacuum.

E) a fluorescent screen.

Answer: a prism

Question:

Answer: a scanning tunneling microscope.

Question: A patient suffering from tuberculosis could be diagnosed by use of the __________ stain.

Answer: acid-fast

Question: Which of the following phenomena produces magnification?

A) The refraction of radiation as it passes through a lens

B) The thickness of a microscopic specimen

C) The numerical aperture of a lens

D) The length of an objective lens

E) The wavelength of a radiation source

Answer: The refraction of radiation as it passes through a lens

Question: All of the following are associated with different types of phase microscopes EXCEPT:

A) a dark-field stop.

B) prisms.

C) a phase plate.

D) unstained specimens.

E) Nomarski microscopes.

Answer: a dark-field stop

Question: Which of the following classification methods relies on the morphology of organisms?

A) biochemical tests

B) analysis of nucleic acids

C) serological tests

D) physical characteristics

E) phage typing

Answer: physical characteristics