2.5 points Save Answer Question 1 Suppose E. coli has a nitrogen to phosphorus r
ID: 192758 • Letter: 2
Question
2.5 points Save Answer Question 1 Suppose E. coli has a nitrogen to phosphorus ratio of 3:1 (3 atoms of N for every atom of P). You are growing E. coli at 37 degrees C on minimal media that has an N:P ratio of 1:1. How should the growth rate respond if you add a new supply of N? 1.decrease 2. no change 3. increase 4.can't tell from information given 2.5 points Save Answer Question 2 How would the growth rate respond if you add a new supply of P? 1.no change 2.increase 3.can't tell from information given 4. decrease 0 2.5 points Save Answer Question 3 What would you expect the response to be if you increased the temperature of incubation by 25 degrees C? 1.can't tell from information given 2.no change 3. decrease 4. increase 2.5 points Save Answer Question 4 What would you expect the response of the growth rate be if the pH was increased by 2 units? 1.decrease 2.no change 3. increase 4. can't tell from information given 0Explanation / Answer
1. Increase.
E.coli has nitrogen to phosphorous ratio 3:1. Now growing at minimal media N:P 1:1. If we increase the concentration of Nitrogen 2:1 or to 3:1 the growth rate will be increase. It get lot of source of nitrogen for further growth.
2. No change
E.coli has nitrogen to phosphorous ratio 3:1. Phosphorous already has enough phosphorous for their growth. If increase in Phosphorous not going to change anything in the growth rate.
3. Decrease
At optimum temperatute 37oC it growth rate is high, If decrease in temperature to 25oC the rate will be decrease.
4. can't tell from information give.
They did't dine any information about pH
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