What type of microscopy was used to capture this micrograph?

What type of microscopy was used to capture this micrograph?

• A. Transmission electron microscopy
• B. Scanning electron microscopy
• C. Light microscopy
• D. Confocal microscopy

Answer: (A)

Transmission electron microscopy uses an electron beam transmitted through an ultrathin specimen to reveal internal ultrastructure. The micrograph’s very fine, high-contrast details of inner components—membranes, organelles, and dense regions—are characteristic of TEM, reflecting its nanometer-scale resolution after heavy-metal staining. Light microscopy cannot resolve such internal detail due to the diffraction limit, and scanning electron microscopy emphasizes surface texture rather than internal organization, while confocal microscopy relies on fluorescence labeling and optical sections rather than raw ultrastructure. Because the image shows internal cellular architecture with such clarity, this is consistent with transmission electron microscopy.

Transmission electron microscopy uses an electron beam transmitted through an ultrathin specimen to reveal internal ultrastructure. The micrograph’s very fine, high-contrast details of inner components—membranes, organelles, and dense regions—are characteristic of TEM, reflecting its nanometer-scale resolution after heavy-metal staining. Light microscopy cannot resolve such internal detail due to the diffraction limit, and scanning electron microscopy emphasizes surface texture rather than internal organization, while confocal microscopy relies on fluorescence labeling and optical sections rather than raw ultrastructure. Because the image shows internal cellular architecture with such clarity, this is consistent with transmission electron microscopy.