1|Page
ASU MIC 205 PENTON EXAM 1 NEWEST ACTUAL
EXAM COMPLETE QUESTIONS AND 100% CORRECT
ANSWERS(UPDATED&GRADED A+) NEWEST
VERSION!!
What are aquaporins? - ANSWER-Aquaporins are water
channels through which water molecules move through
the plasma membrane during osmosis.
What is facilitated diffusion? - ANSWER-Facilitated
diffusion is a passive transport process that uses specific
transport proteins to help move larger or polar molecules
across the membrane.
How do Gram-positive bacteria appear after the Gram
staining process? - ANSWER-Purple under a microscope
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Are Gram-positive bacteria generally more or less
susceptible to antibiotics that target the peptidoglycan
layer? - ANSWER-More susceptible
What type of toxins do Gram-positive bacteria typically
produce? - ANSWER-Exotoxins
Name two examples of Gram-positive bacteria. -
ANSWER-Staphylococcus aureus, Streptococcus
pneumoniae
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What are the components of the cell wall structure in
Gram-negative bacteria? - ANSWER-Thin Peptidoglycan
Layer, Outer Membrane
How do Gram-negative bacteria stain in the Gram staining
process? - ANSWER-Do not retain crystal violet, appear
pink after counterstaining with safranin
Why are Gram-negative bacteria often more resistant to
antibiotics? - ANSWER-Due to protective outer
membrane, efflux pumps, and porins that limit drug entry
What can act as endotoxins in Gram-negative bacteria? -
ANSWER-Lipopolysaccharides in the outer membrane
, 4|Page
Provide examples of Gram-negative bacteria. - ANSWER-
Escherichia coli, Salmonella
What do penicillin antibiotics act on with the bacterial cell?
- ANSWER-the peptidoglycan layer
Are gram + or gram -bacteria more susceptible to these
antibiotics? - ANSWER-gram + are more susceptible due
to their thick peptidoglycan layer. Gram - is less
susceptible because it has an outer membrane and a thin
peptidoglycan layer making it harder for penicillin to
ASU MIC 205 PENTON EXAM 1 NEWEST ACTUAL
EXAM COMPLETE QUESTIONS AND 100% CORRECT
ANSWERS(UPDATED&GRADED A+) NEWEST
VERSION!!
What are aquaporins? - ANSWER-Aquaporins are water
channels through which water molecules move through
the plasma membrane during osmosis.
What is facilitated diffusion? - ANSWER-Facilitated
diffusion is a passive transport process that uses specific
transport proteins to help move larger or polar molecules
across the membrane.
How do Gram-positive bacteria appear after the Gram
staining process? - ANSWER-Purple under a microscope
,2|Page
Are Gram-positive bacteria generally more or less
susceptible to antibiotics that target the peptidoglycan
layer? - ANSWER-More susceptible
What type of toxins do Gram-positive bacteria typically
produce? - ANSWER-Exotoxins
Name two examples of Gram-positive bacteria. -
ANSWER-Staphylococcus aureus, Streptococcus
pneumoniae
,3|Page
What are the components of the cell wall structure in
Gram-negative bacteria? - ANSWER-Thin Peptidoglycan
Layer, Outer Membrane
How do Gram-negative bacteria stain in the Gram staining
process? - ANSWER-Do not retain crystal violet, appear
pink after counterstaining with safranin
Why are Gram-negative bacteria often more resistant to
antibiotics? - ANSWER-Due to protective outer
membrane, efflux pumps, and porins that limit drug entry
What can act as endotoxins in Gram-negative bacteria? -
ANSWER-Lipopolysaccharides in the outer membrane
, 4|Page
Provide examples of Gram-negative bacteria. - ANSWER-
Escherichia coli, Salmonella
What do penicillin antibiotics act on with the bacterial cell?
- ANSWER-the peptidoglycan layer
Are gram + or gram -bacteria more susceptible to these
antibiotics? - ANSWER-gram + are more susceptible due
to their thick peptidoglycan layer. Gram - is less
susceptible because it has an outer membrane and a thin
peptidoglycan layer making it harder for penicillin to
