Questions and Answers
Which of the following is responsible for conducting protein synthesis in bacteria?
70S ribosomes
Which type of organisms multiply by budding?
Fungi
Which microorganism is MOST probably isolated from the skin lesion of a patient with pyoderma based on the microscopic examination?
Staphylococcus aureus
In pneumonia cases, the presence of diplococci with pointed ends, arranged in pairs, most probably indicates the presence of which organism?
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How many stages does the Gram-staining procedure consist of?
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Which of the following is NOT a universal entity for all Eukaryotes?
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What kind of microorganisms was found in the oropharyngeal swabs taken from the patient with angina?
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Which one of the statements is the MOST accurate comparison of human and bacterial cells?
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According to Gram-staining procedure, all bacteria can be broadly divided into what basic groups?
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Which bacterial surface structure is responsible for the adherence to eukaryotic cell surface?
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Each of the following statements concerning the Gram stain is correct EXCEPT:
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Obligatory structures of bacterial cell are:
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The lysozyme hydrolyzes the linkage between N-acetylmuramic acid and N-acetyl glucosamine causing:
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Which component of Gram-negatives LPS is responsible for toxic properties of endotoxin?
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Which of the following statements about bacterial cell wall is TRUE?
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Study Notes
Protein Synthesis
- Protein synthesis in bacteria is conducted by ribosomes.
Microorganism Multiplication
- Yeast multiplies by budding.
Skin Lesion Analysis
- Microscopic examination of skin lesions from patients with pyoderma suggests the presence of Staphylococcus aureus.
Pneumonia Diagnosis
- Diplococci with pointed ends, arranged in pairs, are indicative of Streptococcus pneumoniae in pneumonia cases.
Gram-Staining Procedure
- The Gram-staining procedure consists of four stages.
Eukaryotic Characteristics
- Lysosomes are not a universal entity for all Eukaryotes.
Oropharyngeal Swab Analysis
- β-hemolytic streptococci are commonly found in oropharyngeal swabs taken from patients with angina.
Human and Bacterial Cells
- Human cells have a true nucleus, while bacterial cells have a nucleoid.
Gram-Staining Classification
- According to the Gram-staining procedure, bacteria can be broadly divided into Gram-positive and Gram-negative groups.
Bacterial Adherence
- Fimbriae are responsible for the adherence of bacteria to eukaryotic cell surfaces.
Gram Stain Exceptions
- Not all bacteria can be Gram-stained.
Bacterial Cell Structure
- Obligatory structures of bacterial cells include a cell wall, cell membrane, and cytoplasm.
Lysozyme Function
- Lysozyme hydrolyzes the β-1,4 glycosidic bond between N-acetylmuramic acid and N-acetyl glucosamine, causing cell wall lysis.
Endotoxin Toxicity
- Lipid A is responsible for the toxic properties of endotoxin in LPS.
Bacterial Cell Wall
- The bacterial cell wall provides structural support and maintains cell shape.
