Multiple Choice
Which of the following is a function of the bacterial flora?
33
views
1. Introduction to Microbiology
Members of the Bacterial World
Struggling with Microbiology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following enzymes are expressed by some strains of Staphylococcus aureus?
A
Urease
B
Coagulase
C
Oxidase
D
Catalase
Verified step by step guidance1
Step 1: Understand the role of each enzyme listed in the problem and their association with bacterial species. This helps in identifying which enzymes are characteristic of Staphylococcus aureus.
Step 2: Recall that coagulase is an enzyme that some strains of Staphylococcus aureus produce. It causes blood plasma to clot by converting fibrinogen to fibrin, which is a key virulence factor.
Step 3: Recognize that catalase is also produced by Staphylococcus aureus, but it is not unique to it; many other bacteria produce catalase to break down hydrogen peroxide into water and oxygen.
Step 4: Note that urease and oxidase are enzymes produced by other bacteria but are generally not associated with Staphylococcus aureus. Urease breaks down urea, and oxidase is involved in electron transport chains in certain bacteria.
Step 5: Conclude that among the options, coagulase is the enzyme specifically expressed by some strains of Staphylococcus aureus, making it a useful diagnostic marker to differentiate it from other staphylococci.
6:17mWatch next
Master Members of the Bacterial World with a bite sized video explanation from Jason
Start learningRelated Videos
Related Practice
Members of the Bacterial World practice set
Problem sets built by lead tutorsExpert video explanations