20 Questions
Which of the following is a characteristic of Lactobacillus bacteria?
Rod-shaped with no spores, found naturally in the stomach, mouth, intestines, and vagina
Which feature of Corynebacterium bacteria is described in the text?
They reproduce by snapping division, forming V-shapes or palisades
Why are Mycobacterium and Nocardia bacteria difficult to identify using the Gram stain?
They have very waxy cell walls that reject the crystal violet dye
Which of the following is a characteristic of Actinomycetes bacteria?
They form branching filaments and reproduce by spores
Which of the following is a famous member of the Alphaproteobacteria group?
Rhizobium, a nitrogen fixer
What is a key feature of the prostheca structure found in Alphaproteobacteria?
It helps them survive with little nutrients
How do Mycobacterium and Nocardia bacteria differ from other Gram-positive bacteria in terms of staining?
They require the Ziehl-Neelsen acid-fast staining technique
What is the purpose of the nitrogen-fixing ability of Rhizobium bacteria, which are Alphaproteobacteria?
To form root nodules on plants
Which of the following is a key feature of the Actinomycetes group of bacteria?
They are exclusively aerobic and take months to grow on plates
How do Mycobacterium and Nocardia bacteria differ from other Gram-positive bacteria in terms of their cell wall composition?
They have very waxy cell walls that reject the crystal violet dye used in Gram staining
What is the main difference between a communicable disease and a contagious disease?
Communicable diseases can be transmitted indirectly, while contagious diseases require direct contact
Which of the following best describes the term 'prevalence' in epidemiology?
The total number of cases of a disease in a population at a given time
What is the primary focus of hospital epidemiology?
Studying the spread of diseases within hospital settings
Which of the following factors is NOT listed as contributing to nosocomial infections in hospitals?
Poor sanitation practices in the community
What is the primary difference between an acute disease and a subacute disease?
Subacute diseases have a duration and severity in between acute and chronic diseases
What is the primary focus of the field of epidemiology?
Studying the distribution and determinants of diseases within populations
How are epidemics typically identified?
By comparing the actual number of cases to the expected number of cases
What is the primary characteristic of a latent disease?
The pathogen remains inactive for a long period of time
Which of the following statements about non-communicable diseases is true?
They arise from normal microbiota or outside of hosts
What is the primary difference between incidence and prevalence in epidemiology?
Prevalence measures the total number of cases at a given time, while incidence measures new cases over a period
Test your knowledge of bacterial taxonomics, microorganism groups, the three domains of life, and simple phylogenetics in this quiz prepared by Nick Inglis, Ph.D. for BMS 100 Week 6. Questions cover topics like energy sources, carbon consumption, and rRNA sequences.
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