15 Questions
What kind of organisms are small nucleated eukaryotic unicellular organisms multiplying by budding?
Fungi
Which of the following is NOT a characteristic of bacteria?
Energy is generated in mitochondria
A Gram stained smear from a skin lesion shows Gram positive cocci arranged in grapes-like clusters. Which microorganism is MOST probably isolated?
Staphylococcus aureus
What kind of organisms are most probably found in a sputum smear in a pneumonia case, where diplococci with pointed ends, arranged in pairs, are observed?
Neisseria meningitidis
How many stages does the Gram-staining procedure consist of?
3
Which of the following structures is NOT a universal entity for all Eukaryotes?
Peptidoglycan
What kind of microorganisms was found in the oropharyngeal swabs of the patient with angina?
Streptococci
Which one of the statements is the MOST accurate comparison of human and bacterial cells?
Human cells have a cell wall containing murein, bacterial cell wall contains peptidoglycan
According to Gram-staining procedure, all bacteria can be broadly divided into what basic groups?
Gram positive and Gram negative
Which bacterial surface structure is responsible for adherence to the eukaryotic cell surface?
Common-pili
Obligatory structures of bacterial cell are:
Nucleoid, cytoplasm, cell wall
Each of the following statements concerning the Gram stain is correct EXCEPT:
Streptococcus pyogenes stains dark purple because it has a thick peptidoglycan layer and teichoic acids
The lysozyme hydrolyzes the linkage between N-acetylmuramic acid and N-acetyl glucosamine causing:
The cell to become osmotically-fragile
Which component of Gram-negatives LPS is responsible for toxic properties of endotoxin?
Lipid A
Which of the following statements about bacterial cell wall is TRUE?
Gracilicutes cell wall contains teichoic and lipoteichoic acids
Test your knowledge of microbiology with these multiple-choice questions covering topics such as bacterial characteristics, eukaryotic organisms, and skin lesion examination.
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