Question

the first strands of dna were observed through which microscope?
○ tunneling microscope
○ simple microscope
○ compound light microscope
○ electron microscope

Explanation:

To determine the microscope used to observe the first strands of DNA, we analyze each option:

• A tunneling microscope (scanning tunneling microscope) is for atomic/molecular scale, not early DNA observation.
• A simple microscope has low magnification, insufficient for DNA.
• A compound light microscope’s resolution is too low for DNA strands.
• Electron microscopes (like transmission electron microscopes) have high resolution, and the first DNA strands were observed using an electron microscope.

Answer:

D. electron microscope