FREE AND STUDY GAMES ABOUT MICROBIOLOGY CH. 15

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FREE AND STUDY GAMES ABOUT MICROBIOLOGY CH. 15

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -70 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Hepatitis B virus transmitted by a finger

Answer:

stick device is transmitted by which portal of entry?

Question 2: Coagulase

Answer:

a bacterial enzyme that causes blood plasma to clot

Question 3: Lysogenic conversion

Answer:

the acquisition of new properties by a host cell infected by a lysogenic phage

Question 4: Antigenic variation

Answer:

changes in the surface antigens that occur in a microbial population

Question 5: Based on these LD50 values, which microbe is the most virulent? Assume each bacterium enters through the appropriate portal of entry.

Answer:

Shigella

Question 6: Receptor

Answer:

an attachment for a pathogen on a host cell

Question 7: Tumor necrosis factor (TNF)

Answer:

a polypeptide released by phagocytes in response to bacterial endotoxins, induces shock; also called cachetin Question 8: Which one of the following virulence factors contributes most to the spread of disease in the body?

Answer:

hyaluronidase

Question 9: Cytopathic effect (CPE)

Answer:

a visible effect on a host cell caused by a virus, that may result in host cell damage or death

Question 10: Pathogenicity

Answer:

the ability of a microbe to cause disease by overcoming the defenses of a host

Question 11: Protein kinase

Answer:

an enzyme that activates another protein by adding a phosphate from ATP

Question 12: Which of these statements is true regarding portals of exit?

Answer:

In most cases, a microbe uses the same portal for both entry and exit.

Question 13: Cytotoxin

Answer:

a bacterial toxin that kills host cells or alters their function

Question 14: Which of these diseases cannot be prevented by toxoids?

Answer:

gram

Question 15: Which of these organisms does not produce an enterotoxin?

Answer:

Clostridium botulinum

Question 16: Toxemia

Answer:

the presence of toxins in the blood Question 17: Which of these substances does not protect a bacterium from phagocytosis?

Answer:

siderophores Question 18: Given the following LD50 values for Bacillus anthracis, through which portal of entry is it easiest to get anthrax?

Answer:

Cutaneous

Question 19: Kinase

Answer:

1.enzyme that removes a phosphate from ATP and attaches to another molecule;

• bacterial enzyme that breaks down fibrin (blood clots)

Question 20: Septic shock

Answer:

a sudden drop in blood pressure induced by bacterial toxins, usually endotoxins from gram negative bacteria

Question 21: Amanitin

Answer:

a polypeptide mushroom toxin that causes liver and nerve damage

Question 22: Enterotoxin

Answer:

an exotoxin that causes gastroenteritis, such as those produced by Staphylococcus, Vibrio, and Escherichia

Question 23: Which of these organisms does not produce a neurotoxin?

Answer:

rabies virus

Question 24: Parenteral route

Answer:

a portal of entry for pathogens by deposition directly into tissues beneath the skin and mucous membranes

Question 25: M protein

Answer:

a heat and acid resistant protein of streptococcal cell walls and fibrils

Question 26: Mycotoxin

Answer:

a toxin produced by a fungus

Question 27: Sclerotia

Answer:

the compact mass of hardened mycelia of the fungus Claviceps purpura that fills infected rye flowers producing the toxin ergot

Question 28: Neurotoxin

Answer:

an Exotoxin that interferes with normal nerve impulse conduction