Microbiology Fundamentals A Clinical Approach, 2nd ed. by Cowan Chapter 6.
Microbiology Fundamentals: A Clinical Approach, 2nd ed. by Cowan Chapter 6 Microbial Nutrition Correct Answer- Bacteria require a constant influx of certain substances from their habitat All organisms require a source of elements such as carbon, hydrogen, oxygen, phosphorous, potassium, nitrogen, sulfur, calcium, iron, sodium, chloride, magnesium, and certain other elements Essential Nutrient Correct Answer- Any substance that must be provided to an organism 6 Essential Nutrients for Humans Correct Answer- Protein Carbs Fat Water Vitamins Minerals Macronutrients Correct Answer- Required in relatively large quantities and play principal roles in cell structure and metabolism 97% of cells are made of organic molecules (carbon, hydrogen, oxygen, carbohydrates, proteins, etc.) Other Important Nutrients Correct Answer- Sodium (Na): important for certain types of cell transport Calcium (Ca): stabilizer of cell wall and endospores of bacteria Magnesium (Mg): component of chlorophyll and a stabilizer of membranes and ribosomes Iron (Fe): important component of the cytochrome proteins of cell respiration Micronutrients (trace elements) Correct Answer- Present in much smaller amounts and are involved in enzyme function and maintenance of protein structure Manganese, zinc, nickel, iron Chemical Analysis of the Microbial Cytoplasm Correct Answer- Water - 70% of all components Organic compounds - 97% of dry cell weight Most chemical elements available to the cell as compounds (not pure elements) Only a few types of nutrients needed to synthesize over 5,000 different compounds Autotroph Correct Answer- An organism that uses inorganic CO2 as its carbon source Has the capacity to convert CO2 into organic compounds
Document information
- Uploaded on
- January 13, 2024
- Number of pages
- 17
- Written in
- 2023/2024
- Type
- Exam (elaborations)
- Contains
- Questions & answers
