The Development of Which of the Following Instruments or Techniques

question 5

Multiple Choice

The development of which of the following instruments or techniques in the 1930's allowed scientists to visualize viral particles for the first time?

• A) polymerase chain reaction
• B) electron microscope
• C) confocal microscope
• D) thermal cycler
• E) plaque assay

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Definitions:

Alveoli

Tiny air sacs within the lungs where the exchange of oxygen and carbon dioxide takes place.

Nasal Cavity

The large air-filled space above and behind the nose in the middle of the face that warms, moistens, and filters air entering the body through the nose.

Bronchiole

Small airways in the lungs that extend from the bronchi and lead to the alveolar ducts.

Laryngopharynx

The lower part of the pharynx just below the oropharynx, facilitating the passage of food to the esophagus and air to the larynx.