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WGU D311 MICROBIOLOGY OA EXAM LATEST ACTUAL
EXAM COMPLETE 2024-2025 VERSION A, B & PRACTICE
EXAM ALL 300 QUESTIONS AND CORRECT DETAILED
ANSWERS ALREADY GRADED A+
D311 WGU Microbiology OA EXAM A Which feature of infection indicates the presence of a primary pathogen rather than an opportunistic pathogen?
- The number of virulence factors
- The number of symptoms
- Patients with compromised immunity
- Patients with healthy immune systems - ANSWER-D. Patients with healthy immune systems.
After oral antibiotic therapy, a patient is diagnosed with vaginitis.
What type of microbe could be causing this opportunistic infection?
- Fungus
- Helminth
- Virus
- Archaea - ANSWER-A. Fungus
What type of microbe is used to deliver gene therapies to human cells?
- Bacteria
- Virus
- Protozoan 1 / 4
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- Fungus - ANSWER-B. Virus
What type of diseases are found in higher numbers than expected in local populations?
- Endemic
- Sporadic
- Epidemic
- Pandemic - ANSWER-C. Epidemic
- Latrogenic
- Zoonotic
- Noncommunicable
- Vectors-transmitted - ANSWER-A. Iatrogenic
swelling and redness at their incision site. How would this infection be classified?
Which viral virulence factor requires adjustments to the influenza vaccine annually?
- Antigenic variation
- Encapsulation
- Adhesion
- Replication - ANSWER-A. Antigenic variation
Which pair of enzymes are produced by some bacteria that causes the clotting of blood to protect the bacteria in the bloodstream, then a digestion of the clots to allow the bacteria to spread?
- Coagulase and kinase
- Protease and phospholipid
- Hyaluronidase and collagenase 2 / 4
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- Coagulase and nuclear - ANSWER-A. Coagulase and kinase
How does coinfection of a single cell by multiple strains of a virus increase its pathogenicity?
- Coinfection provides the opportunity for an antigenic shift
- Coinfection limits the opportunity for harmful mutations
- Coinfection provides the animal to adapt to the pathogen
- Coinfection provides the opportunity for the pathogen to integrate into the cells genome -
ANSWER-A. Coinfection provides the opportunity for an antigenic shift.
Canned food is heated and sealed in sterile containers to provide a longer shelf life and prevent spoilage. Improper canning results in the growth of microorganisms, which may result in food containers that swell and explode.
Which staining technique can be used to identify these microorganisms?
- Endospore staining
- Negative staining
- Acid fast staining
- Flagella staining - ANSWER-A. Endospore staining
Which describes a mutualistic relationship?
- Deinococcus radiodurans growing in the vacuum of space
- Ruminococcus species using nutrients from a cow's diet to digest plant cellulose in the rumen
- Matigophora Protozoa feeding on soil bacteria to improve decomposition
- Chlorobium species using the radiation from hot rocks to perform photosynthesis - ANSWER-
- Ruminococcus species using nutrients from a cow's diet to digest plant cellulose in the
rumen. 3 / 4
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Why are photosynthetic bacteria and algae important to the carbon cycle on Earth?
- Photosynthetic microbes metabolize carbon dioxide, fix carbon, and produce oxygen
- Photosynthetic microbes metabolize peroxide, fix oxygen, and produce carbon dioxide
- Photosynthetic microbes remove nitrogen from the air and produce ammonia
- Photosynthetic microbes remove carbon from plant roots and produce nitrogen gas -
ANSWER-A. Photosynthetic microbes metabolize carbon dioxide, fix carbon, and produce oxygen.
What microbial process is used by bacteria and fungi to produce many common food products, such as soy sauce, bread, and yogurt?
- Nitrogen fixation
- Photosynthesis
- Fermentation
- Biofilm formation - ANSWER-C. Fermentation
Which beneficial role do viruses have in the environment?
- Fixing nitrogen at plant roots to promote growth
- Decomposing biomaterials to provide plants with solid nutrients
- Integrating into plant genomes to increase drought tolerance
- Releasing light through bioluminescence to be used for photosynthesis - ANSWER-C.
Integrating into plant genomes to increase drought tolerance.
A dental hygienist nicked the gum of the patient during a routine cleaning. A mild infection of the gum was followed 10 days later with acute bacterial endocarditis.
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