Question 19M.3.SL.TZ2.11
| Date | May 2019 | Marks available | [Maximum mark: 4] | Reference code | 19M.3.SL.TZ2.11 |
| Level | SL | Paper | 3 | Time zone | TZ2 |
| Command term | Explain | Question number | 11 | Adapted from | N/A |
Explain the use of two named bacteria in response to pollution incidents.
[4]
a. bacteria metabolize pollutants
OR
bacteria used in bioremediation
OR
microorganisms use pollutant as an energy source/carbon source ✔
first named bacteria:
b. name of bacterium used in bioremediation «eg: Pseudomonas» ✔ Allow any other verified example.
c. name of pollutant/substrate «eg: oil/methyl mercury» ✔
d. product of degradation «eg: CO2 and H2O/elemental mercury» ✔
second named bacteria:
e. name of bacterium used in bioremediation «eg: Marinobacter» ✔ Allow any other verified example.
f. name of pollutant/substrate «eg: benzene» ✔
g. product of degradation «eg: CO2» ✔
Award [3 max] if two bacteria are not named
Good explanations were given of the use of bacteria in response to pollution incidents. This was the best answered question in this option.
