Multiple Choice
According to food safety guidelines, food must be thrown out after remaining in the temperature danger zone for how long?
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1. Introduction to Microbiology
Introduction to Microbiology
Multiple Choice
Which of the following is an example of microbial change?
A
Binary fission in Escherichia coli
B
Photosynthesis in cyanobacteria
C
Mutation leading to antibiotic resistance in bacteria
D
Formation of endospores in Bacillus species
Verified step by step guidance1
Understand the concept of microbial change: it refers to a genetic alteration or mutation within a microorganism that can lead to new traits or characteristics, such as antibiotic resistance.
Analyze each option to determine if it represents a genetic change or a physiological/biochemical process:
Binary fission in Escherichia coli is a method of asexual reproduction, producing identical daughter cells, so it is not a genetic change but a replication process.
Photosynthesis in cyanobacteria is a metabolic process where light energy is converted into chemical energy, which is a physiological function, not a genetic change.
Formation of endospores in Bacillus species is a survival mechanism involving differentiation into a dormant state, which is a physiological adaptation, not a genetic mutation.
Mutation leading to antibiotic resistance in bacteria involves a change in the DNA sequence, resulting in a new trait that can be passed on, making it a clear example of microbial change.
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