Which of the following could be used to study general features of cells?
Select one:
a. a magnifying glass
b. scanning electron microscope
c. transmission electron microscope
d. binoculars
e. light microscope
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The correct answer is: light microscope
Question 2
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Question text
Which of the following activities is a function of the plasma membrane?
Select one:
a. digestion of unneeded cell organelles
b. recognition of bacterial cells by the immune system
c. transport of products from the nucleus to the endoplasmic reticulum
d. cell metabolism
e. detoxification
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The correct answer is: recognition of bacterial cells by the immune system
Question 3
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Question text
The lower limit of resolution of a light microscope is
Select one:
a. 100μm
b. 0.1μm
c. 10μm
d. 0.01μm
e. 1.0μm
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The correct answer is: 0.1μm
Question 4
Correct
This study source was downloaded by 100000829957125 from CourseHero.com on 09 -17-2021 05:42:04 GMT -05:00
Question text
Which of the following is NOT true of a transmission electron microscope (TEM)?
Select one:
a. The limit of resolution is about 0.1nm.
b. Electrons are passed through the specimen.
c. Gives the clearest three-dimensional images.
d. The specimen must be fixed in plastic.
e. The electron beam is focused with electromagnets.
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The correct answer is: Gives the clearest three-dimensional images.
Question 5
Incorrect
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Question text
What structure does "D" represent on the diagram of the plasma membrane?
Select one:
a. membrane channel protein
b. phospholipid bilayer
c. internal membrane surface
This study source was downloaded by 100000829957125 from CourseHero.com on 09 -17-2021 05:42:04 GMT -05:00
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