General Microbiology Final Exam
Questions And Answers| Full Set
Correct
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 - Ans--Viruses and Yeasts
"Spontaneous Generation" means: - Ans--nonliving matter gives rise to
living organisms
Who is credited with first observing living microorganisms? - Ans--Anton
van Leeuwenhoek
Proponents of the theory of spontaneous generation criticized Louis
Jablot's experiment with sealed flasks of broth because: - Ans--No air was
allowed to reach the broth
Who discovered that DNA is the molecule of genetic heredity? - Ans--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) - Ans--True
Who performed an early experiment, with covered and uncovered pieces of
meat, that weakened the theory of spontaneous generation? - Ans--
Francesco Redi
The first step for directly linking a microbe to a specific disease according to
Koch's postulates is to - Ans--find the microbe in all diseased animals, but
no healthy ones
,In the name "Staphylococcus aureus", "Staphylococcus" is the: - Ans--
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? - Ans--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? - Ans--150x
True or False: Technological improvements in lens-making may someday
allow us to see viruses with light microscopes - Ans--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 - Ans--0.2 um
A microorganism measures 5 um in length. Its length in mm would be: -
Ans--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? - Ans--Purple
Which microscope is used to observe viruses and the internal structure of
thinly sectioned cells? - Ans--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: - Ans--Acid-fast
Which step in the gram stain is the critical step in differentiating gram-
positive cells from gram-negative cells? - Ans--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. - Ans--True
A prokaryotic cell may possess each of the following cellular components
EXCEPT:
A) Mitochondria
B) Pili
C) Ribosomes
D) A cell membrane - Ans--Mitochondria
Bacteria of the shape shown would be described as: - Ans--Spirilli
Bacteria with the shape and arrangement shown would be described as: -
Ans--Streptobacilli
A firmly-attached, tightly-organized glycocalyx, used for protection against
phagocytosis, is a: - Ans--Capsule
Short, thin, rigid structures extending out from a bacterial cell and used to
help it attach to surfaces are: - Ans--Fimbriae
Which of the following statements is TRUE?
A) Endospores are for reproduction
B) Endospores allow a cell to survive environmental changes
C) Endospores are easily stained in a gram stain
D) A cell can produce many endospores - Ans--Endospores allow a cell to
survive environmental changes
Which of the following pairs is mismatched?
A) Centrosomes--Mitotic spindle organization
B) Gogli complex--Modification of proteins for secretion
C) Mitochondria--ATP production
D) Lysosome--Lipid synthesis and storage - Ans--Lysosome--lipid
synthesis and storage
The key difference between the outer covering of gram-positive bacteria
and gram-negative bacteria is: - Ans--Gram-positive bacteria have a thick
Questions And Answers| Full Set
Correct
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 - Ans--Viruses and Yeasts
"Spontaneous Generation" means: - Ans--nonliving matter gives rise to
living organisms
Who is credited with first observing living microorganisms? - Ans--Anton
van Leeuwenhoek
Proponents of the theory of spontaneous generation criticized Louis
Jablot's experiment with sealed flasks of broth because: - Ans--No air was
allowed to reach the broth
Who discovered that DNA is the molecule of genetic heredity? - Ans--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) - Ans--True
Who performed an early experiment, with covered and uncovered pieces of
meat, that weakened the theory of spontaneous generation? - Ans--
Francesco Redi
The first step for directly linking a microbe to a specific disease according to
Koch's postulates is to - Ans--find the microbe in all diseased animals, but
no healthy ones
,In the name "Staphylococcus aureus", "Staphylococcus" is the: - Ans--
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? - Ans--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? - Ans--150x
True or False: Technological improvements in lens-making may someday
allow us to see viruses with light microscopes - Ans--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 - Ans--0.2 um
A microorganism measures 5 um in length. Its length in mm would be: -
Ans--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? - Ans--Purple
Which microscope is used to observe viruses and the internal structure of
thinly sectioned cells? - Ans--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: - Ans--Acid-fast
Which step in the gram stain is the critical step in differentiating gram-
positive cells from gram-negative cells? - Ans--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. - Ans--True
A prokaryotic cell may possess each of the following cellular components
EXCEPT:
A) Mitochondria
B) Pili
C) Ribosomes
D) A cell membrane - Ans--Mitochondria
Bacteria of the shape shown would be described as: - Ans--Spirilli
Bacteria with the shape and arrangement shown would be described as: -
Ans--Streptobacilli
A firmly-attached, tightly-organized glycocalyx, used for protection against
phagocytosis, is a: - Ans--Capsule
Short, thin, rigid structures extending out from a bacterial cell and used to
help it attach to surfaces are: - Ans--Fimbriae
Which of the following statements is TRUE?
A) Endospores are for reproduction
B) Endospores allow a cell to survive environmental changes
C) Endospores are easily stained in a gram stain
D) A cell can produce many endospores - Ans--Endospores allow a cell to
survive environmental changes
Which of the following pairs is mismatched?
A) Centrosomes--Mitotic spindle organization
B) Gogli complex--Modification of proteins for secretion
C) Mitochondria--ATP production
D) Lysosome--Lipid synthesis and storage - Ans--Lysosome--lipid
synthesis and storage
The key difference between the outer covering of gram-positive bacteria
and gram-negative bacteria is: - Ans--Gram-positive bacteria have a thick
