MMG 301 Exam 1 Unit 1 Evaluation
questions with verified answers to pass
In an optical microscope with a 10x ocular lens and three different objective lenses, 4x, 10x, and
40x, what is the highest possible magnification that a slide can be observed at. - correct answer
✔✔10 x 40 = 400x
Daptomycin is an antibiotic that binds to the bacterial membrane and allows ions to freely flow
through the membrane. How would this kill a cell? - correct answer ✔✔The ion concentrations
inside and outside the cell would equalize, disrupting the energy conservation function of the
membrane.
Please order the flagellar assembly from the first component to the final component. - correct
answer ✔✔1) MS/C rings
2) Mot proteins
3) P/L rings
4) Hook
5) Cap
6) Filament
Rank the following primary metabolic pathways in the order that a bacterial species would
prefer to use them, assuming it was capable of all of them. - correct answer ✔✔1) Aerobic
respiration
2) Anaerobic respiration
3) Fermentation
, An antibiotic was discovered that inhibits growth of Gram-negative bacteria and does not inhibit
Gram-positive bacteria. From the list below, select the cell process that this antibiotic would
most likely inhibit. - correct answer ✔✔Lipopolysaccharide (LPS) synthesis
A bacterial cell is stained with India ink. What is causing the visible halo that the arrow is
pointing to? - correct answer ✔✔Capsule
Streptococcus mutans is a common component of dental plaque. However, the bacteria is not
found on the tongue of a person even if it is present on their teeth. What type of molecule is
most likely responsible for this specificity? - correct answer ✔✔Fimbria because fimbriae are
long filamentous polymeric protein structures located at the surface of bacterial cells. They
enable the bacteria to bind to specific receptor structures and thereby to colonize specific
surfaces.
Cells are grown in growth media cultures containing increasing concentrations of sodium. As
sodium increases, rates of entry into the cell of the nutrient succinate increases. What does this
show? - correct answer ✔✔These cells have a sodium dependent succinate symporter
Explain how to find what generates the most energy on the redox tower? - correct answer ✔✔
Mannitol salt agar (MSA) is a laboratory medium hat is pink in color and contains 7.5% NaCl,
along with other complex organic molecules. Only Staphylococcal species that ferment
mannitol, such as Staphylococcus aureus, turn the medium yellow. Colonies of species that
cannot ferment mannitol, such as Staphylococcus epidermis, cause no color change in the
medium. Which statement best describes MSA? - correct answer ✔✔MSA is selective for S.
species and differential for S. aureus
The antibiotic telavancin inhibits bacterial growth by binding to alanine (D-Ala) residues in
peptidoglycan, restricting the capacity of bacteria cells to grow and divide. Gram positive
bacterial cells are sensitive to telavancin while Gram negative bacterial cells are insensitive to
this antibiotic. Based on your knowledge of the cellular structure of Gram negative and Gram
positive bacteria, provide a molecular explanation for the insensitivity demonstrated by Gram
questions with verified answers to pass
In an optical microscope with a 10x ocular lens and three different objective lenses, 4x, 10x, and
40x, what is the highest possible magnification that a slide can be observed at. - correct answer
✔✔10 x 40 = 400x
Daptomycin is an antibiotic that binds to the bacterial membrane and allows ions to freely flow
through the membrane. How would this kill a cell? - correct answer ✔✔The ion concentrations
inside and outside the cell would equalize, disrupting the energy conservation function of the
membrane.
Please order the flagellar assembly from the first component to the final component. - correct
answer ✔✔1) MS/C rings
2) Mot proteins
3) P/L rings
4) Hook
5) Cap
6) Filament
Rank the following primary metabolic pathways in the order that a bacterial species would
prefer to use them, assuming it was capable of all of them. - correct answer ✔✔1) Aerobic
respiration
2) Anaerobic respiration
3) Fermentation
, An antibiotic was discovered that inhibits growth of Gram-negative bacteria and does not inhibit
Gram-positive bacteria. From the list below, select the cell process that this antibiotic would
most likely inhibit. - correct answer ✔✔Lipopolysaccharide (LPS) synthesis
A bacterial cell is stained with India ink. What is causing the visible halo that the arrow is
pointing to? - correct answer ✔✔Capsule
Streptococcus mutans is a common component of dental plaque. However, the bacteria is not
found on the tongue of a person even if it is present on their teeth. What type of molecule is
most likely responsible for this specificity? - correct answer ✔✔Fimbria because fimbriae are
long filamentous polymeric protein structures located at the surface of bacterial cells. They
enable the bacteria to bind to specific receptor structures and thereby to colonize specific
surfaces.
Cells are grown in growth media cultures containing increasing concentrations of sodium. As
sodium increases, rates of entry into the cell of the nutrient succinate increases. What does this
show? - correct answer ✔✔These cells have a sodium dependent succinate symporter
Explain how to find what generates the most energy on the redox tower? - correct answer ✔✔
Mannitol salt agar (MSA) is a laboratory medium hat is pink in color and contains 7.5% NaCl,
along with other complex organic molecules. Only Staphylococcal species that ferment
mannitol, such as Staphylococcus aureus, turn the medium yellow. Colonies of species that
cannot ferment mannitol, such as Staphylococcus epidermis, cause no color change in the
medium. Which statement best describes MSA? - correct answer ✔✔MSA is selective for S.
species and differential for S. aureus
The antibiotic telavancin inhibits bacterial growth by binding to alanine (D-Ala) residues in
peptidoglycan, restricting the capacity of bacteria cells to grow and divide. Gram positive
bacterial cells are sensitive to telavancin while Gram negative bacterial cells are insensitive to
this antibiotic. Based on your knowledge of the cellular structure of Gram negative and Gram
positive bacteria, provide a molecular explanation for the insensitivity demonstrated by Gram
