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Micro Chapter 6
Microbial Nutrition and Growth
| Question | Answer |
|---|---|
| Nutrition | Process by which chemical substances called nutrients are acquired from the environment and used in cellular activities such as metabolism |
| Essential Nutrient | any substance that must be provided to an organism |
| Macronutrients | required in large quantities and play principal roles in cell structure and metabolism |
| What are the Macronutriends | CHONPS |
| What does Hydrogen do | holds bonds and molecules |
| NH3 role | binds to carbon and forms amino acids which are the building blocks of nucleic acid |
| Micronutrients/Trace Elements | Present in smaller amounts and are involved in enzyme function and maintenance of protein structure |
| What are the environmental influences that influence Microbial Growth | Temperature, Gases, Ph, Osmotic Pressure |
| Cardinal temperature | the range of temperature for the growth of a given microbial species |
| Minimum temperature | the lowest temperature that permits a microbe's continued growth and metabolism; below this temperature its activities are limited |
| Maximum temperature | the highest temperature at which growth and metabolism can proceed before proteins are denatured |
| Optimum temperature | an intermediate between the minimum and the maximum that promotes the fastest rate of growth and metabolism |
| 5 categories of Microbes based on temperature range | psychrophilies, psychrotrophs, mesophiles, thermophies, extreme thermophiles (hyperthermophiles) |
| psychrophiles |
Created by:
clintones
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