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WorksheetsStudying cells
Total questions: 20
Worksheet time: 22mins
The ________ of the microscope would give you the SMALLEST field of view.
low power objective
medium power objective
high power objective
stage
Eyepiece = 10X
Objective lens = 4X
What is needed to produce an image for a transmission electron microscope?
Light
A living cell
A vacuum
A very thin specimen
Calculate the actual size of a mesophyl cell if the its drawing has a length of 350mm and the magnification of the drawing is 700x
0.002μm
0.02nm
0.002nm
0.0002μm
If the nucleus is 650 times bigger than a particular mitochondria, what is the size of this mitochondria (in nm) if the nucleus measures 130Um in diameter
(a)
The intermembrane space of a mitochondrion measures 1.25nm in width. What is the magnification of the diagram of that intermembrane space if it measures 0.75mm in width.
600x
6000x
60x
60,000x
the average lysosome has a size of 1.2µm and the average ribosome has a size of 25nm. How many ribosomes can be packed into a lysosome?
(a)
The magnification of a diagram of a leaf is 210x. And the actual thickness of the leaf is 243µm. What is the thickness of the drawing in cm?
(a)
When would you use the diaphragm?
When you wanted to move the stage
When you wanted to adjust the light
When you wanted to put the microscope away
When you want to change the objective lens
A primary objective of cell fractionation is to
view the structure of cell membranes.
determine the size of various organelles
separate the major organelles so that their particular functions can be determined
identify the enzymes outside the organelle
In the fractionation of homogenized cells using centrifugation, the primary factor that determines whether a specific cellular component ends up in the supernatant or the sediment is?
the relative solubility of the component.
the size and weight of the component
the percentage of carbohydrates in the component
the number of enzymes in the fraction
Which of the following correctly lists the order in which cellular components will be found in the sediment when homogenized cells are treated with increasingly rapid spins in a centrifuge?
ribosomes, nucleus, mitochondria
chloroplasts, ribosomes, vacuoles
nucleus, ribosomes, chloroplasts
nucleus, mitochondria, ribosomes
In homogenisation, a cold buffering solution is used. What is the purpose of this buffering solution?
(a)
