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WorksheetsEnvironmental Microbiology
Total questions: 10
Worksheet time: 5mins
Microbes that live in extreme conditions produce enzymes of industrial interest called __________.
extremiphiles
extremozymes
extremisomes
extremylase
The two kinds of relationship between plant roots and fungi that extend the root surface area are
Endomycorrhizae
Ectomycorrhizae
Exomycorrhizae
Entromycorrhizae
What is the biggest challenge in studying soil microorganisms?
Too many microbes
Cost of study too expensive
Most soil microbe are un-culturable
Most doil microbes have been studied
Why are microbes important in nitrogen cycle?
They play a big role in ammonfication
They are important in nitrogen fixation
They are important in the process of assimilation
They are responsible for the process of denitrification
Which of the following is not true of xenobiotics?
susceptible to degradation
chemicals found but not produced in organisms or the environment
chemical substances that are foreign to animal life
man made chemicals that are present in the environment
Which of the following is not true of bioremediation?
use biological organisms to solve an environmental problem
uses mainly microorganisms or microbial enzymes to treat contaminated soil and other environments
biodegradation of toxic material by microbes or plants
process of using chemicals to treat contaminated media, including water, soil and subsurface material
What is bioaugmentation?
the process by which organic substances are broken down into simpler organic matter
modification of the environment to stimulate existing bacteria capable of bioremediation
adding cultured microbes into the subsurface to biodegrade specific soil and groundwater contaminants.
the decomposition of the chemical compounds in organic matter
Which is not true about commercial sterilization?
applies just enough heat to destroy the endospores of Clostridium botulinum
kills all froms of microbes
used to achieve long-term shelf stability for canned foods
applied to a food after the product is placed in a container
What is High-Pressure Food Preservation?
foods submerged into pressurized water tanks
product is processed under very high pressure and high temperature
method of preserving and sterilizing food
product is processed under very high pressure
Which is not true on secondary metabolites?
compounds produced by bacteria that are not basic need for their growth and reproduction
competitive weapons used against other bacteria
compounds produced that is required for the growth of microbes
play an important role in defense
