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General Microbiology Final Exam With Questions And Correct Answers Latest Version
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General Microbiology Final Exam With Questions And Correct Answers Latest Version
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General Microbiology Final Exam WithQuestions And Correct Answers Latest
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Which of the following are included in the category "microorganisms"?
A) Viruses
B) Yeasts (fungi)
C) Ticks
D) A and B
E) All of the above Answer: Viruses and Yeasts
"Spontaneous Generation" means: Answer: nonliving matter gives rise to living organisms
Who is credited with first observing living microorganisms? Answer: Anton van Leeuwenhoek
Proponents of the theory of spontaneous generation criticized Louis Jablot's experiment with sealed
flasks of broth because: Answer: No air was allowed to reach the broth
Who discovered that DNA is the molecule of genetic heredity? Answer: Avery, McCloud, and
MacCarty
True or False: Koch's Postulates can be fulfilled for every disease that's caused by microorganisms (as
long as it's culturable) Answer: True
Who performed an early experiment, with covered and uncovered pieces of meat, that weakened the
theory of spontaneous generation? Answer: Francesco Redi
2024
,The first step for directly linking a microbe to a specific disease according to Koch's postulates is to
Answer: find the microbe in all diseased animals, but no healthy ones
In the name "Staphylococcus aureus", "Staphylococcus" is the: Answer: genus
What key aspect of Pasteur's experiment with the S-necked flasks made it more convincing than
previous experiments in the argument against spontaneous generation? Answer: In Pasteur's
experiment, air was allowed to reach the broth unaltered
What is the total magnification of a specimen viewed with a 15x ocular lens and a 10x objective lens?
Answer: 150x
True or False: Technological improvements in lens-making may someday allow us to see viruses with
light microscopes Answer: False
Which of the following resolutions would best allow you to distinguish fine detail in a specimen?
A) 0.2 um
B) 2 um
C) 0.2 mm
D) 2 mm Answer: 0.2 um
A microorganism measures 5 um in length. Its length in mm would be: Answer: 0.005 mm
You are performing a gram stain on gram-positive bacteria and you stop after the addition of the
decolorizer (acetone-alcohol). What is the appearance of the bacteria at this point? Answer: Purple
2024
, Which microscope is used to observe viruses and the internal structure of thinly sectioned cells?
Answer: Transmission electron microscope
Assume you stain a bacterial smear by applying carbolfuschin with heat and then counterstaining with
methylene blue. Through the microscope, the organisms that appear red are: Answer: Acid-fast
Which step in the gram stain is the critical step in differentiating gram-positive cells from gram-negative
cells? Answer: Alcohol-acetone
True or False: A student has obtained a sample of pond water for study. Using the high-power lens, he
observes several cells with nuclei. He can conclude that the cells are NOT bacteria. Answer: True
A prokaryotic cell may possess each of the following cellular components EXCEPT:
A) Mitochondria
B) Pili
C) Ribosomes
D) A cell membrane Answer: Mitochondria
Bacteria of the shape shown would be described as: Answer: Spirilli
Bacteria with the shape and arrangement shown would be described as: Answer: Streptobacilli
A firmly-attached, tightly-organized glycocalyx, used for protection against phagocytosis, is a: Answer:
Capsule
Short, thin, rigid structures extending out from a bacterial cell and used to help it attach to surfaces are:
Answer: Fimbriae
2024
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