MCB 100 Exam II Questions With Complete Solutions
__________ is the application of heat to a liquid to kill potential
agents of infection and spoilage without destroying the product's
taste or nutritional value. Correct Answers Pasteurization
A bacterial generation is defined as the time it takes for the
number of bacteria in a culture to _________. Correct Answers
Double
A microorganism that grows at a low pH is called _______.
Correct Answers Acidophile
A microorganism that grows at the temperature of a refrigerator
is called _________. Correct Answers Psychrophile
A microorganism that grows best at a high pH is called
__________. Correct Answers Alkalinophile
A microorganism that grows best at a temperature that humans
consider to be moderate is called _______. Correct Answers
Mesophile
A microorganism that grows best at a temperature that is above
50C is called _______. Correct Answers Thermophile
A microorganism that grows best when the concentration of O2
is between 2-10% (air is 21% O2) is called _________. Correct
Answers Microaerophile
, A microorganism that grows best when the water is very salty is
called ________. Correct Answers Halophile
How can we sterilize a liquid without heat? Correct Answers
Filtration can be used to sterilize a liquid.
In bacteria, what is a large circular ring of DNA that constitutes
the majority of the genomic material? Correct Answers
Chromosome
In MCB-100, what do we consider the easiest to kill? Correct
Answers Enveloped viruses
In MCB-100, what do we consider the hardest to kill? Correct
Answers Bacterial endospores
Irradiation is used to kill microorganisms on foods including:
Correct Answers Strawberries, beef and poultry
Is adding salt or spices or drying meat bacteriostatic or
bacteriocidal? Correct Answers Bacteriostatic
Is an ideal disinfectant soluble in water? Correct Answers Yes
Is refrigeration bacteriostatic or bacteriocidial? Correct Answers
Bacteriostatic
Membranous or Non-Membanous? Ribosome. Correct Answers
Non-Membranous
__________ is the application of heat to a liquid to kill potential
agents of infection and spoilage without destroying the product's
taste or nutritional value. Correct Answers Pasteurization
A bacterial generation is defined as the time it takes for the
number of bacteria in a culture to _________. Correct Answers
Double
A microorganism that grows at a low pH is called _______.
Correct Answers Acidophile
A microorganism that grows at the temperature of a refrigerator
is called _________. Correct Answers Psychrophile
A microorganism that grows best at a high pH is called
__________. Correct Answers Alkalinophile
A microorganism that grows best at a temperature that humans
consider to be moderate is called _______. Correct Answers
Mesophile
A microorganism that grows best at a temperature that is above
50C is called _______. Correct Answers Thermophile
A microorganism that grows best when the concentration of O2
is between 2-10% (air is 21% O2) is called _________. Correct
Answers Microaerophile
, A microorganism that grows best when the water is very salty is
called ________. Correct Answers Halophile
How can we sterilize a liquid without heat? Correct Answers
Filtration can be used to sterilize a liquid.
In bacteria, what is a large circular ring of DNA that constitutes
the majority of the genomic material? Correct Answers
Chromosome
In MCB-100, what do we consider the easiest to kill? Correct
Answers Enveloped viruses
In MCB-100, what do we consider the hardest to kill? Correct
Answers Bacterial endospores
Irradiation is used to kill microorganisms on foods including:
Correct Answers Strawberries, beef and poultry
Is adding salt or spices or drying meat bacteriostatic or
bacteriocidal? Correct Answers Bacteriostatic
Is an ideal disinfectant soluble in water? Correct Answers Yes
Is refrigeration bacteriostatic or bacteriocidial? Correct Answers
Bacteriostatic
Membranous or Non-Membanous? Ribosome. Correct Answers
Non-Membranous
