STRAIGHTERLINE MICRO 250 FINAL PREP EXAM

STRAIGHTERLINE MICRO 250 FINAL PREP EXAM

LATEST ACTUAL EXAM QUESTIONS AND

CORRECT DETAILED ANSWERS (VERIFIED

ANSWERS) ALREADY GRADED A+

When monocytes migrate from the blood out to the tissues, they are transformed by inflammatory mediators to develop into ______.

Select one:

• primary phagocytes
• neutrophils
• killer T cells
• cytotoxic T cells
• macrophages - ANSWER✔✔macrophages

The multidrug resistant pumps in many bacterial cell membranes function by

Select one:

• bacterial chromosomal mutations.
• synthesis of enzymes that alter drug structure.
• removing the drug from the cell when it enters. - ANSWER✔✔removing the drug

from the cell when it enters.The Western blot test is confirmatory for HIV because it

Select one:

• is more sensitive than the ELISA. 1 / 4

• has fewer false positives than the ELISA.
• requires electrophoresis, whereas the ELISA does not.
• uses an indicator of some sort to visualize the antibody.
• All of the choices are correct. - ANSWER✔✔All of the choices are correct.

Endospores can be inactivated by

Select one:

• dry heat at 170°C for 2 hours.
• incineration.
• glutaraldehyde for 3 or more hours.
• ethylene oxide for 3 or more hours.
• All of the choices are correct. - ANSWER✔✔All of the choices are correct.

Question text In the movie "Contagion", one person who has become infected with a recombinant pathogenic virus spreads it to a large number of people with whom she comes into contact. Those people then spread it to others, and, before you know it, the disease has spread all over the world. This is an example of a _______ epidemic.

Select one:

• point-source
• common-source
• propagated
• endemic - ANSWER✔✔propagated

Which of the following is not a genotypic method of identification? 2 / 4

Select one:

• rRNA sequencing
• Pulse-field gel electrophoresis
• G + C composition
• Direct antigen testing
• DNA analysis with probes - ANSWER✔✔Direct antigen testing

Which drug is used to treat cases of tuberculosis?

Select one:

• Penicillin G
• Vancomycin
• Tetracycline
• Synercid
• Isoniazid - ANSWER✔✔Isoniazid

Once a mother has been sensitized to the Rh factor,

Select one:

• all other Rh+ fetuses are at risk.
• she can be given RhoGAM in future pregnancies to prevent hemolytic disease of the

newborn.

• she can never again have a low risk pregnancy.
• only future Rh- fetuses are at risk.
• None of the choices are correct. - ANSWER✔✔all other Rh+ fetuses are at risk. 3 / 4

All of the following are associated with IgE and mast-cell-mediated allergy except

______.

Select one:

• drug allergies
• eczema
• anaphylaxis
• allergic asthma
• systemic lupus erythematosus - ANSWER✔✔systemic lupus erythematosus

Necrotizing fasciitis is

Select one:

• also called impetigo.
• possibly caused by antibodies to Group A streptococci that cross-react with body

tissues.

• associated with strains of Streptococcus pyogenes producing destructive enzymes

and toxins.

• typically a sequelae of streptococcal pharyngitis.
• not treatable with antimicrobial drugs - ANSWER✔✔associated with strains of

Streptococcus pyogenes producing destructive enzymes and toxins.Which of the following is a febrile disease characterized by a rash and is caused by a virus that can cross the placenta to cause serious fetal damage?

Select one:

• Impetigo
• Shingles
• / 4