Bacteriology-1 Quiz with Dogukan Ozbey
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Questions and Answers

What is the first step in molecular diagnostics for identifying microorganisms?

  • Sequencing
  • Electrophoresis
  • DNA/RNA Extraction (correct)
  • Protein Amplification

What is the main difference between gingivitis and periodontitis?

  • The bacterial strains causing them
  • The type of treatment needed
  • The severity of inflammation (correct)
  • The location of infection

Which technique is used to monitor disease and decide on individualized therapies in medicine?

  • Nucleic Acid Amplification
  • Polymerase Chain Reaction (PCR)
  • Molecular Diagnostics (correct)
  • Electrophoresis

Why are dental infections rarely life-threatening today?

<p>Improved Dental Hygiene (D)</p> Signup and view all the answers

What causes a dental abscess?

<p>A build-up of pus due to an infection (B)</p> Signup and view all the answers

What is the main characteristic of prokaryotes?

<p>They lack membrane-bound organelles (D)</p> Signup and view all the answers

What is the function of the flagellum in prokaryotes?

<p>It provides structural background for chemotaxis (C)</p> Signup and view all the answers

What is the role of the cell wall in prokaryotes?

<p>It protects the bacterial cell and gives it shape (C)</p> Signup and view all the answers

Which of the following is a characteristic of binary fission?

<p>It results in the reproduction of a living prokaryotic cell by dividing it into two parts (D)</p> Signup and view all the answers

What is the role of the cytoplasm in prokaryotes?

<p>It is a gel-like substance containing various cellular components (C)</p> Signup and view all the answers

What happens during the lag phase of the bacterial growth curve?

<p>Bacteria try to adapt to the environment (B)</p> Signup and view all the answers

Which of the following statements about Staphylococcus lugdunensis is true?

<p>It is negative for both slide and tube coagulase tests. (A)</p> Signup and view all the answers

Which of the following statements about Micrococci is incorrect?

<p>They are coagulase-positive and produce pigmented colonies. (D)</p> Signup and view all the answers

Which of the following is a characteristic of Streptococci?

<p>They divide in one direction, forming chains. (B)</p> Signup and view all the answers

Which of the following is a pyogenic Streptococcus?

<p>Streptococcus pyogenes (A)</p> Signup and view all the answers

Which of the following Streptococci is part of the viridans group?

<p>Streptococcus bovis (D)</p> Signup and view all the answers

Which of the following is an example of a viridans Streptococcus?

<p>Streptococcus salivarius (B)</p> Signup and view all the answers

What is the timeframe for the development of late-onset disease in neonates?

<p>Between 1 week and 3 months of age (D)</p> Signup and view all the answers

Which group of streptococci is most prevalent on the pits and fissures in the oral cavity?

<p>Mutans group (C)</p> Signup and view all the answers

Which streptococcal group can be divided into anginosus, mitis, mutans, and salivarius groups?

<p>Oral streptococci (B)</p> Signup and view all the answers

Which streptococcal species can contribute to oral diseases along with S. sobrinus?

<p>S. mutans (C)</p> Signup and view all the answers

Which streptococcus typically shows α-hemolysis on blood agar?

<p>S. mitis (D)</p> Signup and view all the answers

What is the primary organism involved in dental caries?

<p>Streptococcus mutans (D)</p> Signup and view all the answers

Which of the following is a way that pneumoniae can spread into the central nervous system?

<p>Through the bloodstream after bacteremia (B)</p> Signup and view all the answers

What is usually the precursor to the disease caused by pneumoniae?

<p>A viral infection of the upper respiratory tract (B)</p> Signup and view all the answers

Which of the following is true about the presence of bacteria in the blood of patients with sinusitis or otitis media?

<p>Bacteria are generally not present in the blood (B)</p> Signup and view all the answers

What is a common characteristic of the destruction of valve tissue in endocarditis?

<p>It is common (D)</p> Signup and view all the answers

What is the predominant end product of glucose fermentation by the enterococci?

<p>Lactic acid (A)</p> Signup and view all the answers

Which of the following antibiotics is used to treat antibiotic-resistant enterococcal infections?

<p>Daptomycin, Linezolid, Streptogramins, Tigecycline (D)</p> Signup and view all the answers

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