Practice Questions Theory and Microscopes Quiz

What did Robert Hooke observe in a slice of cork under the microscope?

• Tiny empty chambers he called “cells”

• Living organisms swimming inside the cork

• Nuclei inside the plant cells

• Animal cells dividing

Which of the following is a key concept of the cell theory?

• Cells are only found in animals

• All living things are made up of cells

• New cells form from spontaneous generation

• Cells are only in plants and fungi

What tool allowed scientists to develop the cell theory?

• Thermometer

• Microscope

• Telescope

• X-ray machine

What contribution did Matthias Schleiden make to the cell theory?

• He was the first person to observe living cells

• He concluded that all plants are made of cells

• He proposed that new cells come from nonliving material

• He invented the electron microscope

Which scientist stated that all animals are made of cells?

• Robert Hooke

• Anton van Leeuwenhoek

• Theodor Schwann

• Rudolf Virchow

What is the main purpose of a light microscope?

• To magnify small objects using beams of electrons

• To use light to pass through a specimen and magnify it

• To create three-dimensional images of cell surfaces

• To detect color changes in specimens

How do scientists make cell structures more visible under a microscope?

• They shine more light on the specimen

• They use chemical stains or fluorescent dyes

• They enlarge the microscope’s objective lens

• They use a telescope instead of a microscope

Which type of microscope can magnify up to 1000 times and is best for viewing living cells?

• Scanning electron microscope

• Transmission electron microscope

• Light microscope

• Atomic force microscope

What is a major limitation of an electron microscope?

• It cannot magnify more than 500 times

• It can only be used to observe living cells

• It requires a vacuum, so it can only be used on nonliving samples

• It only works with very large specimens

How is a scanning electron microscope (SEM) different from a transmission electron microscope (TEM)?

• SEM produces 2D images, while TEM produces 3D images

• SEM scans the surface of a specimen, while TEM sends electrons through the specimen

• SEM uses light, while TEM uses beams of electrons

• SEM can view living cells, while TEM cannot