Organisms are made of cells. Most organisms are multicellular and have cells that are specialised to do a particular job. Microscopes produce magnified images of cells so we can study them in detail.
What is the function of a ribosome?
To release energy from glucose
To build sugars by photosynthesis
A type of white blood cell called a macrophage measures 5 x 10-5 m.
What does it measure in micrometres?
If the actual size of a cell is 100 μm, and 10 cm in a book, what is the magnification of the image in the book?
How have microscopes developed over the years?
Increased magnification. Decreased resolution
Increased cost. Decreased depth of field
Increased magnification. Increased resolution
If a cell called a megakaryocyte measures 1 x 10-4 m, and a neutrophil measures 1 x 10-5 m, what is the difference in order of magnitude?
Which of the following is an advantage of the transmission electron microscope compared with the light microscope?
Higher magnifications are possible with the transmission electron microscope
The transmission electron microscope has a lower resolution
The transmission electron microscope has a greater depth of field
Which of the following is the correct sequence for setting up a microscope on high power?
Focus on low power with the coarse adjustment. Move the high power objective in line with the specimen. Refocus on high power with the fine adjustment.
Focus on low power with the fine adjustment. Move the high power objective in line with the specimen. Refocus on high power with the coarse adjustment.
Focus on high power with the coarse adjustment. Refocus on high power with the fine adjustment.
Which of the following would you find in plant cells but not in animal cells?
Which the correct order of size from the biggest to the smallest?
40 nm, 300 micrometers, 15mm
15mm, 300 micrometers, 40nm
300 micrometers, 14mm, 40nm
Which of the following is a feature of eukaryotic cells not present in prokaryotic cells?