WorksheetsCell Microscopy(1)
Total questions: 21
Worksheet time: 11mins
Name
Class
Date
1.
A cell organelle measures 4x10-1 mm in diameter. What is diameter in µm?
a)
4x101µm
b)
4x102µm
c)
4x103µm
d)
4x105µm
2.
Which of the following explains why mitochondria structure and function cannot be studied using a light microscope
a)
Mitochondria is enclosed by a double membrane
b)
Mitochondria size is too small for its internal structures to be magnified by the light microscope
c)
Mitochondria size is too small to for its internal structures to the resolved by a light microscope
d)
Mitochondria must be alive for it to be studied
3.
which of these statements are true about the relative sizes of lysosomes and ribosomes?
a)
lysosomes are bigger in size
b)
lysosomes are smaller in size
c)
lysosomes are produced by ribosomes
d)
ribosomes are produced by lysosomes
4.
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)
5.
Student Philip was presented with the photomicrograph of a cell organell. The magnification of the photomicrograph is known. Which calculation of the actual length of the organelle in Um is correct?
a)
actual size in cm X 100 divided by magnification
b)
actual size in mm X 100 divided by magnification
c)
image size in cm X 1000 divided by magnification
d)
image size in mm X 1000 divided by magnification
6.
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)
7.
Plant cells are fixed, stained and viewed through a light microscope. What would be clearly visible at 400x magnification?
a)
Cristae of mitochondria
b)
grana of chloroplast
c)
nucleoli
d)
ribosomes
8.
In which of the following is resolution increased?
a)
when you switch from a light microscope at 1500x magnification to an electron microscope at 1500x magnification
b)
when you switch from a light microscope with 150x magnification to another light microscope with 150x magnificataion
c)
when you switch from an electron microscope to a light microscope
d)
when you switch from the 40x objective to the 4x objective of a light microscope
9.
As magnification is increased………….
a)
field of view increases, but resolution reduces
b)
field of view reduces, but resolution increases
c)
field of view reduces, but resolution remains the same
d)
field of view reduces and resolution reduces
10.
which structure is measured in the units shown using a light microscope?
a)
cell surface membrane, nm
b)
cell wall, nm
c)
chloroplast, µm
d)
ribosome, µm
11.
what is responsible for the high resolution of the electron microscope?
a)
high magnification
b)
short wavelength of the electron beam
c)
use of heavy metal stains
d)
very thin sections
12.
Lysosome is 0.4µm in diameter. What is the size in nm
a)
4nm
b)
40nm
c)
400nm
d)
4,000nm
13.
which of the following describes resolution in microscopy?
a)
the ability to distinguish between two objects that are very close together
b)
the clarity of the image formed by the microscope
c)
the number of times the image has been magnified by the objective lens
d)
the power of the microscope to focus on very small objects
14.
what restricts the resolution of the light microscope?
a)
the inability to cut very thin sections
b)
the low light intensity of microscope lamps
c)
the low magnification produced by glass
d)
the wavelengths of visible light
15.
a microscope has a resolution of 200nm. Which of the following organelles would not be resolved using this microscope?
a)
chloroplast
b)
lysosomes
c)
mitochondria
d)
ribosomes
16.
an electron microscope has a higher resolution than a light microscope. Which is a result of the higher resolution?
a)
the aiblity to produce larger images of cells
b)
the ability to see cristae in mitochondria
c)
the ability to see mRNA in all cells
d)
the ability to see th enucleus in eukaryotes
17.
for which cell component would nanometers be the most appropriate unit of measurement?
a)
a cell surface membrane
b)
a chloroplast
c)
a mitochondrion
d)
a nucleolus
18.
what is meant by resolution in light microscopy
a)
the product of the magnifications of the eyepiece and the objective lenses
b)
the shortest distance between two objects that can be seen as separate
c)
the size of the smallest object that can be seen
d)
twice the wavelength used to illuminate the specimen
19.
Which eyepiece and objective lens combination enables you to see the greatest number of cells in the field of view?
a)
eyepiece of 5x, Objective of 10x
b)
eyepiece of 10x, objective of 10x
c)
eyepiece of 5x, objective of 40x
d)
eyepiece of 10x, objective of 40x
20.
Which cell structure can be seen only with an electron microscope?
a)
cell surface membrane
b)
chromosome
c)
nucleolus
d)
vacuole
21.
A lymphocyte has a diameter of 1X10-2 millimeters(mm). What is the diameters in nanometers(nm)?
a)
1x101
b)
1x102
c)
1x103
d)
1x104
100 %
