20 Questions
Which of the following is NOT a factor affecting bacterial growth?
Availability of water
What is the process of endospore formation in bacteria?
The DNA replicates and the new DNA moves to one end of the cell
Which type of bacteria obtain their energy from other chemical reactions and not light?
Chemosynthetic bacteria
What is the main function of antibiotics?
To kill microorganisms
What is the main cause of antibiotic resistance?
All of the above
Which of the following is an example of a beneficial use of bacteria?
Production of antibiotics
What is the purpose of a batch process in bioprocessing?
To allow growth up to a certain point
What is the purpose of a continuous process in bioprocessing?
To continuously add nutrients to the bioreactor
What is the temperature range at which most mammalian bacteria function best?
35-40°C
What is the pH at which most bacteria function best?
pH 7
Which structure of a bacterial cell is responsible for protecting the bacteria from mechanical damage and osmotic rupture?
Cell Wall
What is the function of plasmids in a bacterial cell?
Contain genetic information
Which structure in a bacterial cell contains the genomic DNA?
Nucleoid
Which of the following shapes can bacteria have?
All of the above
How does binary fission occur in bacteria?
The bacteria pinches in its cell membrane and the cell wall grows across the middle
During which phase of bacterial growth do the bacteria adjust to their surroundings and prepare for reproduction?
Lag phase
In which phase of bacterial growth does reproduction begin and the population can grow exponentially?
Log phase
What is the average reproduction time for species like E.coli under ideal conditions?
20 minutes
Why are bacteria classified as prokaryotes?
They do not have a nuclear membrane or membrane-bound organelles
What is the function of the flagellum in a bacterial cell?
Allow the bacteria to move
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