University:
Lake Sumter State College
Course:
MCB 2010C | Microbiology w/Lab
Academic year:

2024
Views:

354

Pages:

3
Author:

Shan

Potential Essay Questions exam 1 Describe how we define a microbe, and explain why the definition can be a challenge. organism that causes disease To see them we use a miscrope, the definition can be challenge because not all microbes are small Explain Koch’s Postulates & how they relate to germ theory of disease Koch’s Postulates states that a microbe is found in all cases of the disease but is absent from healthy individuals Specific diseases are caused by microscopic germs Trying to support the germ theory Explain how the use of DNA info has transformed microbiology DNA info is an essential factor because it helps in the development of new vaccines,diagnostic tests, etc Describe the fundamental attributes of a successful pathogen Must attach to host, avoid host immune system , replicate & steal nutrients from host, exit & go to another uninflected one - Describe the 5 stages of an infection Incubation : time from exposure to an infectious agent Prodromal : nonspecific symptoms- fever, low grade fever Illness : shows apparent symptoms of an infectious disease Stade of decline :immune systems fights back, decrease of infectious particles Convalescence :symptoms resolve, return to normal state Explain the differences among endemic,epidemic & pandemic disease Endemic disease is one that is always present in a community at a low rate Epidemic disease is one in which the # of cases increases in a community in a short time Pandemic disease is an epidemic that spreads worldwide Compare 2 types of miscopy TEM : electron beams penetrate a very thin slice of tissue with very high resolution Fluorescence : samples are stained with a fluorescent dye Describe how a Gram Stain is performed Applying a stain to a sample in glass microscope slides & looking at it under a microscope In your opinion which characteristic is most important when viewing a microbe. Magnification, Resolution or Contrast? Explain. The most important is resolution because even if you magnify the sample without resolution, the image will or may still be blurry. For example, if there are two samples without resolution, you won't be able to see and identify what you are looking at. Chapter 4, 5 essay questions Describe the pathogenicity of Cholera Chlorea is transmitted by the fecal- oral route. Vibrio chlorea, the bacteria that causes chlorea, is made pathogenic by one of its parasites, the CTX virus Why is water so important in microbial life ? Water is essential to all living organisms. It functions as a solvent, a temperature buffer & a metabolite in living cells. How does a protein folded/ shape that is functional ? What is binary fission