MICROBIOLOGY EXAM 1 (PEARSON)
WITH DETAILED ANSWERS
A positively charged sodium ion
-would get stuck in the hydrophobic core of the membrane
-would require the use of integral protein channels to pass through a cell
membrane
-freely diffuses directly across the cell membrane - correct answerwould require
the use of integral protein channels to pass through a cell membrane
A prokaryotic cell may possess each of the following cellular components except
-ribosomes
-flagella
-a nucleus
-a cell membrane
-a cell wall - correct answerA nuclues
A strain of neisseria gonorrhoeae has been genetically altered and can no longer
produce fimbriae. What is a likely outcome
-it will be readily phagocytized upton entering the host
-it will be unable to carry out aerobic respiration
-it will demonstrate increased resistance to antibiotics
-it will be unable to adhere to host tissues and establish infection - correct
answerit will be unable to adhere to host tissue an establish infection
A strain of Streptococcus pneumoniae is no longer able to synthesize its capsular
polysaccharide. What is the likely outcome
-it will produce more potent toxins which damage the host
-it will no longer be able to carry out fermentation
-it will be readily phagocytized upon entering the host
, -it will no longer be motile - correct answerit will be readily phagocytized upon
entering the host
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
T/F - correct answerTrue
A type of peripheral protein above that can be used as a receptor or in enzymatic
functions - correct answerGlycoprotein
Active transport powers the diffusion of water across the cell membrane
T/F - correct answerFalse
All cells possess a cell wall
T/F - correct answerFalse
All pathogens known to infect humans have been identified at this point in time
T/F - correct answerFalse
Amoxicillin is an antibiotic that inhibits the formation of peptide cross-links.
Amoxicillin, therefore, would most likely inhibit the growth of ________ - correct
answerBoth gram-positive and gram-negative organisms
Antibiotics that target cell wall synthesis ultimately cause bacterial cell death as a
result of - correct answerosmotic lysis
Anton van Leeuwenhoek was the first microbiologist to use a microscope to
examine environmental samples for the presence of microorganisms
T/F - correct answerTrue
Archaea differ from bacteria in that archaea
-lack nuclei
-have diverse cell wall compositions
-reproduce by binary fission
-are prokaryotic
WITH DETAILED ANSWERS
A positively charged sodium ion
-would get stuck in the hydrophobic core of the membrane
-would require the use of integral protein channels to pass through a cell
membrane
-freely diffuses directly across the cell membrane - correct answerwould require
the use of integral protein channels to pass through a cell membrane
A prokaryotic cell may possess each of the following cellular components except
-ribosomes
-flagella
-a nucleus
-a cell membrane
-a cell wall - correct answerA nuclues
A strain of neisseria gonorrhoeae has been genetically altered and can no longer
produce fimbriae. What is a likely outcome
-it will be readily phagocytized upton entering the host
-it will be unable to carry out aerobic respiration
-it will demonstrate increased resistance to antibiotics
-it will be unable to adhere to host tissues and establish infection - correct
answerit will be unable to adhere to host tissue an establish infection
A strain of Streptococcus pneumoniae is no longer able to synthesize its capsular
polysaccharide. What is the likely outcome
-it will produce more potent toxins which damage the host
-it will no longer be able to carry out fermentation
-it will be readily phagocytized upon entering the host
, -it will no longer be motile - correct answerit will be readily phagocytized upon
entering the host
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
T/F - correct answerTrue
A type of peripheral protein above that can be used as a receptor or in enzymatic
functions - correct answerGlycoprotein
Active transport powers the diffusion of water across the cell membrane
T/F - correct answerFalse
All cells possess a cell wall
T/F - correct answerFalse
All pathogens known to infect humans have been identified at this point in time
T/F - correct answerFalse
Amoxicillin is an antibiotic that inhibits the formation of peptide cross-links.
Amoxicillin, therefore, would most likely inhibit the growth of ________ - correct
answerBoth gram-positive and gram-negative organisms
Antibiotics that target cell wall synthesis ultimately cause bacterial cell death as a
result of - correct answerosmotic lysis
Anton van Leeuwenhoek was the first microbiologist to use a microscope to
examine environmental samples for the presence of microorganisms
T/F - correct answerTrue
Archaea differ from bacteria in that archaea
-lack nuclei
-have diverse cell wall compositions
-reproduce by binary fission
-are prokaryotic
