12 Questions
Who invented the first compound microscope in 1595?
The Janssens
What did Robert Hooke observe under the microscope in 1665?
Cork cells
Which scientist used a single lens microscope to observe bacteria, sperm, and unicellular protozoa?
Antoni van Leeuwenhoek
What is the maximum magnification range of light microscopes?
1000-2000x
Who proposed that all plants and animals are composed of cells, contributing to the development of cell theory?
Theodor Schwann
Which technique uses a laser to concentrate light into a specimen, allowing for the study of cells at the molecular level?
Confocal microscopy
Which aspect of light microscopes is improved by using staining techniques?
Contrast
What is the limiting factor for the resolution of a light microscope?
$0.2$ um (micrometers)
What is the resolution of a scanning electron microscope (SEM) when imaging cell structures?
20 nm
Which microscopy technique allows the study of living cells without killing them using GFP technology?
Fluorescence microscopy
What important observation did Robert Brown make in 1833 that contributed to cell knowledge?
He identified the nucleus as an important cell structure.
Which technique is specifically designed to improve image quality by enhancing contrast between internal structures using fluorescent substances?
Staining techniques
Test your knowledge on the history of microscopes and cell theory with questions on early microscopes and microscopists like The Janssens, Robert Hooke, and Antoni van Leeuwenhoek. Learn about the inventions and observations that paved the way for modern cell biology.
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