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Homework Chapter 7
Microbial Nutrition, Ecology and Growth
Chapter Review Questions: Answer the following questions as you read/review the chapter materials. Make your
answers short and concise, get to the point. Do not copy full paragraphs from the book.
List and describe the source of the essential nutrients of a bacterial cell.
Describe and distinguish between macronutrients and micronutrients.
List and define four different terms that describe an organism’s source of carbon and energy.
Define saprobe and parasite and provide microbial examples of each.
Compare and contrast the processes of diffusion and osmosis.
Identify the effects of isotonic, hypertonic, and hypotonic effects on a bacterial cell.
Name two types of passive transport and three types of active transport and give an example of how
each is used.
List and describe five terms used to express a microbe’s optimal growth temperature.
Summarize three ways in which microorganisms function in the presence of oxygen.
Identify three other physical factors that microbes must contend with in the environment.
List and describe the five major types of microbial associations.
Discuss characteristics of biofilms that differentiate them from planktonic bacteria and their infections.
Summarize the steps of cell division used by most bacteria and describe another method used by fewer
Define doubling time and describe how it leads to exponential growth.
List and define the four phases of growth in a bacterial growth curve.
Homework Chapter 8
Microbial Metabolism the Chemical Crossroads of Life
Chapter Review Questions: Answer the following questions as you read/review the chapter materials.
Make your answers short and concise, get to the point. Do not copy full paragraphs from the book.
Explain the difference between anabolic vs catabolic pathways.
What is the function of enzymes?
What is the energy required to initiate a reaction called?
Describe the chemical composition of simple enzymes and conjugated enzymes.
Give examples of cofactors.
Name the physical factors that influence enzyme activity.
Describe a metabolic pathway.
Describe the two ways by which the activity of an enzyme can be inhibited.
Describe how enzymes can be controlled genetically.
How do cells manage energy?
Define exergonic reactions and endergonic reactions.
What is adenosine triphosphate (ATP) and its function?
How does ATP replenishment occur?
Describe what happens in glycolysis.
Describe what happens in Krebs cycle.
Describe what happens during oxidative phosphorylation and electron transport chain.
Name the two general categories of fermentation products.
Describe the two stages of photosynthesis.