Podcast
Questions and Answers
Which method is used to determine the viable number of bacterial cells present?
Which method is used to determine the viable number of bacterial cells present?
- Total cell count using microscopy
- Spectrophotometry based on optical density
- Colony counting through spread plate technique (correct)
- Micropipetting
What is the relationship between the division rate and death rate in a stationary bacterial culture?
What is the relationship between the division rate and death rate in a stationary bacterial culture?
- They are equal, resulting in no net increase in cell numbers. (correct)
- The death rate is negligible, allowing the division rate to increase infinitely.
- The death rate is higher than the division rate, causing a decline in cell numbers.
- The division rate is higher than the death rate, leading to exponential growth.
At what temperature range do mesophiles grow optimally?
At what temperature range do mesophiles grow optimally?
- Low temperatures at or below 0ËšC
- Midrange temperatures (correct)
- High temperatures above 45ËšC
- Very high temperatures above 80ËšC
Which type of bacteria has an optimum growth temperature at or below 15ËšC?
Which type of bacteria has an optimum growth temperature at or below 15ËšC?
What characteristic helps enzymes in psychrophiles work optimally at low temperatures?
What characteristic helps enzymes in psychrophiles work optimally at low temperatures?
Which type of bacteria can tolerate oxygen but do not require it for growth?
Which type of bacteria can tolerate oxygen but do not require it for growth?
What is the main survival tactic of some bacteria when environmental conditions become tough?
What is the main survival tactic of some bacteria when environmental conditions become tough?
Which type of bacteria are highly resistant to heat and chemicals and can be spread through various means including wind and water?
Which type of bacteria are highly resistant to heat and chemicals and can be spread through various means including wind and water?
What is the correct term for the growth phase of bacteria where binary fission occurs?
What is the correct term for the growth phase of bacteria where binary fission occurs?
Which enzyme is essential for the synthesis of new peptidoglycan in bacterial growth?
Which enzyme is essential for the synthesis of new peptidoglycan in bacterial growth?
Which type of bacteria grow in high salt concentrations but can tolerate a range from none to 6% NaCl?
Which type of bacteria grow in high salt concentrations but can tolerate a range from none to 6% NaCl?
Flashcards are hidden until you start studying
