Microorganisms Friend and Foe
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Q. A certain fungus grows at a rate of 25% per day. If the initial weight of the fungus is 200 grams, what will be its weight after 4 days?
Q. A certain type of yeast ferments sugar at a rate of 10 grams per hour. How much sugar will be fermented in 8 hours?
Q. A lab has 3 types of bacteria. If the ratio of type A to type B to type C is 2:3:5 and the total number of bacteria is 100, how many of type B are there?
Q. A petri dish contains 200 bacteria. If 10% die every hour, how many bacteria will remain after 3 hours?
Q. A virus can infect a cell every 5 minutes. If a cell can be infected by 3 viruses at a time, how many cells can be infected in 1 hour?
Q. If a certain bacterium doubles its population every 3 hours, how many bacteria will there be after 12 hours if the initial population is 100?
Q. If a certain mold grows to 150% of its size every week, what will be its size after 2 weeks if its initial size is 100 grams?
Q. If a certain virus has a reproduction rate of 50% every hour, how many viruses will there be after 3 hours if you start with 10 viruses?
Q. If a culture of bacteria grows from 500 to 2000 in 6 hours, what is the average growth rate per hour?
Q. If a single bacterium divides every 20 minutes, how many bacteria will there be after 2 hours starting from 1 bacterium?
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