Microbiology Quiz: Bacteria, Eukaryotes, and Microscopic Examination

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15 Questions

Which one of the following is NOT a characteristic of bacteria?

Energy is generated in mitochondria

In the context of small nucleated eukaryotic unicellular organisms multiplying by budding, which of the following is the MOST likely classification?

Fungi

Based on the microscopic examination of a Gram stained smear showing Gram positive cocci arranged in grape-like clusters from a skin lesion culture, which microorganism is MOST probably isolated?

Staphylococcus aureus

A bacterioscopy of sputum smear in a pneumonia case revealed the presence of diplococci with pointed ends, arranged in pairs. What kind of organism is most probably found?

Streptococcus pneumoniae

How many stages does the Gram-staining procedure consist of?

3

Which of the following 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 calls 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 the adherence to eukaryotic cell surface?

F-pili

Each of the following statements concerning the Gram stain is correct EXCEPT:

Staphylococcus aureus stains pink because it can be easily decolorized

Obligatory structures of bacterial cell are:

Nucleoid, cytoplasm, cell wall

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 this quiz covering topics such as bacteria characteristics, eukaryotic organisms, and microscopic examination techniques. Questions include identifying features of bacteria, eukaryotic unicellular organisms, and interpreting microscopic examination results.

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