Multiple Choice
An oxidase detection test can be used to identify certain bacteria because they lack which of the following enzymes?
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1. Introduction to Microbiology
Members of the Bacterial World
Multiple Choice
Which of the following statements about human pathogenic bacteria is correct?
A
Most human pathogens are classified as thermophiles.
B
Most human pathogens are classified as mesophiles.
C
Most human pathogens are classified as halophiles.
D
Most human pathogens are classified as psychrophiles.
Verified step by step guidance1
Step 1: Understand the classification of bacteria based on temperature preference. Bacteria are categorized as psychrophiles (cold-loving), mesophiles (moderate temperature-loving), thermophiles (heat-loving), and hyperthermophiles (extreme heat-loving).
Step 2: Recognize that human body temperature is approximately 37°C, which falls within the moderate temperature range.
Step 3: Recall that most human pathogenic bacteria thrive at temperatures close to human body temperature, which means they are adapted to moderate temperatures.
Step 4: Identify that mesophiles are bacteria that grow best at moderate temperatures, typically between 20°C and 45°C, which includes the human body temperature range.
Step 5: Conclude that since human pathogens grow best at human body temperature, they are mostly classified as mesophiles, making the statement 'Most human pathogens are classified as mesophiles' correct.
