Introduction To Bacterial Growth and Nutrition Notes

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Introduction To Bacterial Growth
and Nutrition
Created @November 7, 2024 1:06 PM

Class Microbiology

LO:

Discuss anabolic and catabolic reactions within bacteria

Describe the nutritional requirements of bacteria

Compare and contrast heterotrophic, autotrophic and auxotrophic bacteria

Summarise the usage of nitrogen, phosphorous, sulphur and growth factors
within bacterial metabolism



Anabolism

Biosynthesis, substances being turned into new cellular parts

Catabolism results in energy + nutrients + waste products



Catabolism

Energy for the process is gathered from oxidation of chemical compounds

Results in energy + nutrients + waste products



Catabolic and Anabolic Reactions
Different bacterial cells contains a variety of nutritional requirement and
produces a method for classification



Introduction To Bacterial Growth and Nutrition 1

, Nutritional Requirements

Bacteria need carbon, hydrogen, oxygen, energy source, water and ions

95% of dry weight in microbial cells

Carbon

Oxygen

Hydrogen

Nitrogen

Sulphur

Phosphorus

Potassium

Calcium

Magnesium

Iron

Macro elements

Needed in large quantities

Consists of carbs, lipids, protein and nucleic acids

Cations and their roles

Potassium

Needed for enzyme activity and includes those involved in
protein synthesis

Calcium
Heat resistance of spores

Magnesium
Co-factor, combines with ATP and stabilises ribosomes and
cell membranes




Introduction To Bacterial Growth and Nutrition 2