STUDY GUIDE SIX- Microbial Growth and Control 1. There are four basic categories
ID: 202397 • Letter: S
Question
STUDY GUIDE SIX- Microbial Growth and Control 1. There are four basic categories of organisms, depending on where they get their energy and carbon This can be a little confusing so I will take one of the names and break it down for you: (A) Chemo-auto-troph. The first part of the word describes where the energy is coming from, in this instance, it is chemical in nature. You can think of this organism as needing to take in food. e second part of the word is where they get carbon to make organic compounds in the body. Auto organic compounds. The third part of the word -troph-means to eat. Between that and the textbook, ns self, this means the organism will import carbon dioxide from the atmosphere in order to make you should be able to fill in the box below! Energy source Carbon source Photoautotroph Chemoautotroph Photoheterotroph Chemoheterotroph cla 2. Describe a biofilm. What is quorum sensing and how does it work in relationship to formation of a biofim? (7 a thin s m ofDoutena thar odheres to a rface. querum sersny is cet io ceu signeliny 3. Name some common places biofilms are found. Do you think biofilm formation might be related to nosocomial (hospital acquired) infections? (F)Your teuth 1. You will be using several types of media during this course. Define the following terms that relate to culture media : Defined, Complex, Selective, Differential. Be prepared to determine what kind of media you will be working with from a description! (D) digehon releases mypny diterent chemicals in
Explanation / Answer
1) Photoautotroph: Energy source - Light - photoautotrophs capture the photons from light to produce energy. The energy produced is used to drive the organisms metabolism. Carbon source - Carbon dioxide - the carbon dioxide from the atmosphere is converted to organic materials utilizing the energy obtained from light.
2) Chemoautotroph: Energy source - inorganic chemicals - chemoautotrophs obtain energy by oxidizing the electron donor chemicals found around them. Carbon source - Carbon dioxide - Like photoautotrphs, chemoautotrophs too derive their carrbons from carbon dioxide.
3) Photoheterotrophs: Energy source - Light - Like photoautotrophs, chemoheterotrophs too derive energy from light. Carbon source - organic carbon source. Unlike autotrophs, heterotrophs cannot fix carbon dioxide from atmosphere, hence they use organic carbon sources such as carbohydrates, lipids and proteins to obtain carbon.
4) Chemoheterotrophs - Energy source - Inorganic chemicals - Like chemoautotrophs, chemoheterotrophs too derive energy from inorganic chemicals such as sulfur or ammonia. Carbon source - Organic carbon sources - Like photoheterotrophs, they derive their energy from carbohydrates, lipids and proteins.
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