Bacteriology Quiz 3

Observe the catalase test image, choose the correct reagent used and predict the gas produced.

• hydrogen monoxide as reagent, and O₂ is produced.

• hydrogen hydroxide as reagent, and H₂ is produced.

• hydrogen peroxide as reagent, and O₂ is produced.

• hydrogen peroxide as reagent, and H₂ is produced.

Which Streptolysin is stable towards oxygen?

• SLS, β-hemolysis happened under the surface of blood agar

• SLS, β-hemolysis happened on the surface of blood agar

• SLO, β-hemolysis happened under the surface of blood agar

• SLO, β-hemolysis happened on the surface of blood agar

Which component(s) on Streptococcus pyogenes involved in prevention to phagocytosis?

• M-protein

• F-protein

• Capsule

• LTA

Which component in Staphylococcus aureus interrupt IgG interaction?

• Protein A

• Protein M

• Lipid A

• Lipid M

Endospore formining gene only present in which type of bacteria?

• high GC, G+ve bacteria

• low GC, G+ve bacteria

• high GC, G-ve bacteria

• low GC, G-ve bacteria

Which bacterium resulting in flaccid paralysis / inhibit nerve excitation?

• Clostridium botulinium

• Clostridium perfringens

• Clostridium tetani

• None of the above

Which of the following is not related to SCFA?

• lowering LDL

• lowering pH

• reduce carcinogen formation

• reduce allergy symptom

Which of the following is not the feature of Listeria monocytogenes?

• Able to penetrate through the placenta layer

• Does not have flagella at 37 degree Celsius

• Does not have haemolytic activity

• Able to multiply in the macrophage

Haemolytic activity of which Streptolysin can be inhibited by free circulating cholesterol?

• SLO

• SLS

• SLO & SLS

• None of them

Which type of resistance contributed by dipicolinic acid present in bacterial endospore?

• Heat

• UV

• Oxidative stress

• pH