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level: Topic 1 6: Binary fission

Questions and Answers List

level questions: Topic 1 6: Binary fission

Question	Answer
What is binary fission?	A type of cell division by which prokaryotic cells replicate and divide
Where does the cell cycle happen?	Only in eukaryotic cells
What does binary fission form?	Two daughter cells
What factors can make a bacteria divide really quickly? Use the images for help	Warm environment
Give an example of a bacteria?.	E. coli
How long will an E. coli take to replicate if it is in the right environment?	20 minutes
What happens if the bacteria do not have the conditions they need?	The cell will stop dividing and begin to die
What do you do to estimate the number of bacterias in a population?	Use mean division time
What is the mean division time?	The average amount of time it takes for the bacterial cell to divide into two
A bacterial cell has a mean division time of 30 minutes. How many cells will it have produced adfer 2.5 hours?	2.5 hours x 60 = 150 minutes 150 minutes/ 30 minutes = 5 division 2^5 = 2 x 2 x 2 x 2 x 2 = 32 cells
A bacteria cell divides by binary fission. If it has a mean division time of 18 minutes, how many cells will it have produces after 6 hours? Give your answer to two significant figures.	6 hours x 60 =360 minutes 360 minutes/ 18 minutes = 20 2^20 = 1048576 cells Don't forget to leave it to 2 significant figures so it is 1000000 cells
What is Staphylococcus aureus cell mean division time if it produces 128 cells in 3.5 hours?	30 minutes
If Staphylococcus aureus was put under a different set of conditions, with it have produced 64 cells in 270 minutes, what would the mean division time be under the conditions set. Give your answer to standard form if necessary.	45 minutes
If a bacteria cell can divide once every 20 minutes, how many cells of bacteria would there be in total of 6 hours? Put your answer into standard form.	2.6 x 10^5