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Micro Chapter 6

Microbial Nutrition and Growth

QuestionAnswer
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