BIOL 251 Exam 1 Review (CSN - Josh
Stomel) LATEST 2024 100% SOLVED
Who is credited as the first person to discover microbes?
a) John Tyndle
b) Louis Pasture
c) Josh Stomel
d) Antony van Leeuwenhoek
d) Antony van Leeuwenhoek
Which of the following pieces of evidence would argue against the theory of spontaneous
generation?
a) All meat left uncovered will eventually produce maggots, regardless of whether or not the
meat has been cooked
b) When a sterile bottle of broth is sealed against the air, no microbes grow; however, when it
is unsealed and exposed to air, microbes grow rapidly
c) Microbial cells can grow in a wide variety of environments
d) Whether or not broth grows microbes depends on how the broth was prepared
b) When a sterile bottle of broth is unsealed against the air, no microbes grow; however,
when it is unsealed and exposed to air, microbes grow rapidly
The discovery of bacterial endospores explains why many scientists had difficulty
replicating Pasture's crooked bottle experiment. True or False?
True
Most bacteria are pathogens. True or False?
False
Who is considered the father of modern microbiology?
a) John Needham
,b) Robert Hooke
c) Antony van Leeuwenhoek
d) Louis Pasture
d) Louis Pasture
Which of the following structures would not be found in a bacterial cell?
a) Nucleoid
b) Mitochondria
c) Ribosome
d) Cell wall
b) Mitochondria
Which of the following statements is true for Gram+ cell walls, but false for Gram- cell
walls?
a) They contain lipoteichoic acid
b) They are made of peptidoglycan
c) They contain an outer membrane
d) They are enterotoxic
a) They contain lipoteichoic acid
All bacteria contain a flagella. True or False?
False
What is the function of Gram's Iodine in a Gram stain?
a) It stains the Gram positive cell walls purple
b) It acts to fix the crystal violet in place so that it cannot leave the cell
c) It is a counterstain
d) It washes crystal violet out of Gram negative cell walls
b) It acts to fix the crystal violet in place so that it cannot leave the cell wall
, Which of the following features could be considered virulence factors?
a) Fimbria
b) Nucleoid
c) Glycocalyx
d) Inclusion bodies
e) Cell membran
a) Fimbria and c) Glycocalyx
Which of the following statements is true?
a) Eukaryotes contain DNA chromosomes while prokaryotes do not
b) Bacteria growing in a biofilm are unlikely to respond well to standard antibiotic treatment
c) Bacteria that grow in clusters are more likely to be pathogenic than bacteria that grow in
chains
d) Most bacteria that contain capsules are gram+
b) Bacteria growing in a biofilm are unlikely to respond well to standard antibiotic treatment
Suppose that you are studying an unknown microbe. Which of the following would
support the hypothesis that the microbe was a bacteria?
a) The microbe moves in a run and tumble motif
b) The microbe has a bacillus shape
c) The microbe has a cell wall made of peptidoglycan
d) All of these would support the hypothesis
d) All of these would support the hypothesis
What eukaryotic organelle(s) has a double membrane and contains DNA?
a) Nucleus
b) Endoplasmic Reticulum
c) Mitochondria
Stomel) LATEST 2024 100% SOLVED
Who is credited as the first person to discover microbes?
a) John Tyndle
b) Louis Pasture
c) Josh Stomel
d) Antony van Leeuwenhoek
d) Antony van Leeuwenhoek
Which of the following pieces of evidence would argue against the theory of spontaneous
generation?
a) All meat left uncovered will eventually produce maggots, regardless of whether or not the
meat has been cooked
b) When a sterile bottle of broth is sealed against the air, no microbes grow; however, when it
is unsealed and exposed to air, microbes grow rapidly
c) Microbial cells can grow in a wide variety of environments
d) Whether or not broth grows microbes depends on how the broth was prepared
b) When a sterile bottle of broth is unsealed against the air, no microbes grow; however,
when it is unsealed and exposed to air, microbes grow rapidly
The discovery of bacterial endospores explains why many scientists had difficulty
replicating Pasture's crooked bottle experiment. True or False?
True
Most bacteria are pathogens. True or False?
False
Who is considered the father of modern microbiology?
a) John Needham
,b) Robert Hooke
c) Antony van Leeuwenhoek
d) Louis Pasture
d) Louis Pasture
Which of the following structures would not be found in a bacterial cell?
a) Nucleoid
b) Mitochondria
c) Ribosome
d) Cell wall
b) Mitochondria
Which of the following statements is true for Gram+ cell walls, but false for Gram- cell
walls?
a) They contain lipoteichoic acid
b) They are made of peptidoglycan
c) They contain an outer membrane
d) They are enterotoxic
a) They contain lipoteichoic acid
All bacteria contain a flagella. True or False?
False
What is the function of Gram's Iodine in a Gram stain?
a) It stains the Gram positive cell walls purple
b) It acts to fix the crystal violet in place so that it cannot leave the cell
c) It is a counterstain
d) It washes crystal violet out of Gram negative cell walls
b) It acts to fix the crystal violet in place so that it cannot leave the cell wall
, Which of the following features could be considered virulence factors?
a) Fimbria
b) Nucleoid
c) Glycocalyx
d) Inclusion bodies
e) Cell membran
a) Fimbria and c) Glycocalyx
Which of the following statements is true?
a) Eukaryotes contain DNA chromosomes while prokaryotes do not
b) Bacteria growing in a biofilm are unlikely to respond well to standard antibiotic treatment
c) Bacteria that grow in clusters are more likely to be pathogenic than bacteria that grow in
chains
d) Most bacteria that contain capsules are gram+
b) Bacteria growing in a biofilm are unlikely to respond well to standard antibiotic treatment
Suppose that you are studying an unknown microbe. Which of the following would
support the hypothesis that the microbe was a bacteria?
a) The microbe moves in a run and tumble motif
b) The microbe has a bacillus shape
c) The microbe has a cell wall made of peptidoglycan
d) All of these would support the hypothesis
d) All of these would support the hypothesis
What eukaryotic organelle(s) has a double membrane and contains DNA?
a) Nucleus
b) Endoplasmic Reticulum
c) Mitochondria
