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WGU D311 Microbiology Part 2 (Questions With Proper Answers)
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WGU D311 Microbiology Part 2 (Questions With Proper Answers)
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WGU D311 Microbiology Part 2 (Questions WithProper Answers)
What is showcased when two antibiotics provide bacteriostatic inhibition
when taken separately but bactericidal inhibition when combined?
a) Antagonism
b) Synergism
c) Broad-spectrum antimicrobials
d) Antimicrobial resistance Right Ans - B
Which drug class inhibits cell wall biosynthesis?
a) Sulfonamides
b) Tetracyclines
c) Rifamycin
d) Penicillins Right Ans - D
This is the correct answer because cell wall biosynthesis involves b-lactams, a
class that penicillins are categorized under
Which organism would be affected by an antimicrobial agent that disrupts
peptidoglycan synthesis?
a) Fungi
b) Bacteria
c) Amoeba
d) Archaea Right Ans - B
Which cellular function would be disrupted by an antimicrobial that targets
peptidoglycan synthesis?
a) Cell wall synthesis
b) Protein synthesis
c) Cell membrane synthesis
d) DNA synthesis Right Ans - A
Which structure is damaged by an antifungal that targets ergosterol
synthesis?
a) The cell wall
b) The flagella
c) The ribosome
,d) The cell membrane Right Ans - D
Which molecule is responsible for presenting viral antigen to cytotoxic T cells?
a) Cluster of differentiation 8 (CD8)
b) Major histocompatibility complex II (MHC II)
c) Cluster of differentiation 4 (CD4)
d) Major histocompatibility complex I (MHC I) Right Ans - D
This is correct because MHC I molecules present viral antigens to cytotoxic T
cells
This term refers to cell surface glycoproteins that are used to distinguish
between the different types of white blood cells. Cytotoxic T cells are
characterized by how they express these cell surface glycoproteins Right
Ans - Cluster of differentiation 8 (CD8)
This term refers to cell surface glycoproteins that are used to distinguish
between the different types of white blood cells. Helper T cells and regulatory
T cells are characterized by how they express these cell surface glycoproteins
Right Ans - Cluster of differentiation 4 (CD4)
This class of MHC molecules are found on all nucleated cells. Present normal
self-antigens as well as abnormal or nonself pathogens to the effector T cells
involved in cellular immunity Right Ans - MHC I
This class of MHC molecules are found on macrophages, dendritic cells, and B
cells; they present abnormal or nonself pathogen antigens for the initial
activation of T cells. Right Ans - MHC II
Which statement correctly describes humoral immunity?
a) Humoral immunity is mediated by T cell-produced antibodies.
b) Humoral immunity is mediated by B cell-produced antibodies.
c) Humoral immunity involves regulatory T cells, which destroy infected body
cells.
d) Humoral immunity involves cytotoxic T cells, which destroy infected body
cells. Right Ans - B
This is adaptive immunity that is mediated by antibodies produced by B cells
, Cellular immunity is mediated by what type of cells? Right Ans - T cells
What is the difference between antigens (Ags) and pathogen-associated
molecular patterns (PAMPs)?
a) PAMPs are involved in adaptive immunity; Ags are involved in innate
immunity.
b) PAMPs are found on numerous pathogens; Ags are unique to specific
pathogens.
c) PAMPs are responsible for humoral immunity; Ags are responsible for cell-
mediated immunity.
d) PAMPs inhibit interferon production; Ags inhibit antibody production.
Right Ans - B
Both PAMPs and antigens can be involved in what type of immunity? Right
Ans - Adaptive immunity
Which complete region of an antibody is the site of complement factor
binding?
a) Fragment antigen-binding (Fab) region
b) Light chain region
c) Constant region
d) Fragment crystallization (Fc) region Right Ans - D
This part of an antibody is involved with antigen binding Right Ans -
Fragment antigen-binding (Fab) region
Where do B cells mature? Right Ans - Bone marrow
Where do T cells mature? Right Ans - Thymus
Mechanisms of adaptive specific immunity that involve B cells and antibody
production are referred to as Right Ans - Humoral Immunity
The targeting and destruction of intracellular pathogens by T cells is called
Right Ans - Cellular Immunity
The two "arms" of the Y-shaped antibody molecule are known as the Right
Ans - Fab region
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