12 Questions
What is the approximate doubling time for Escherichia coli?
20 minutes
In bacterial growth, what is the term used to describe the process where one parent cell divides to form 2 progeny cells?
Binary fission
Which of the following is NOT an environmental condition governing bacterial growth according to the text?
Influence of nitrogen
What is required for bacterial growth in terms of nutrients according to the text?
Nutrients for metabolism and energy
In the bacterial growth cycle, how many cells are there after 4 rounds of binary fission?
24
What is one of the factors influencing bacterial growth mentioned in the text?
Influence of hydrogen-ion concentration (pH)
During which phase of bacterial growth do bacteria cells divide rapidly at a logarithmic rate?
Exponential (logarithmic) phase
What phase of bacterial growth is characterized by a steady state represented by a straight horizontal line in the growth curve?
Stationary phase
Which factor influences bacterial growth in vivo and refers to the ability of the microorganism to produce disease?
Virulence
What is the term used to measure the number of organisms required to cause disease?
Infectious dose
Opportunistic pathogens can cause serious infections in immunocompromised patients but rarely cause disease in immunocompetent individuals. Where are these pathogens usually found?
In the human body's normal flora
What phase of bacterial growth is marked by a gradual decline in the number of viable bacteria?
Decline phase
Test your knowledge on the nutrient requirements and environmental conditions affecting bacterial growth. Understand the materials and energy needed for bacterial metabolism, growth, and division.
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