Microbial Contaminants Quiz #4

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1 Methemoglobinemia causes ________ to bind to _______, blocking the uptake of oxygen & causing problems such as “blue baby” syndrome.

A Ammonium, myoglobin

B Ammonia, hemoglobin

C Nitrate, myoglobin

D Nitrite, hemoglobin

2 Which of the following is the smallest living microbial contaminant:

A virus

B bacteria

C protozoan

D helminths

3 Hydrophilic means

A "water changing"

B "water hating"

C "water fearing"

D "water loving"

4 H2CO3 is

A carbonate

B bicarbonate

C carbonic acid

D carbon dioxide

5 A bacterium that undergoes a period of severe stress will form a ________ to keep its offspring alive.

A cyst

B capsid

C oocyst

D spore

6 A reaction between an acid and a base will always form water and ________.

A acid

B base

C salt

D carbonate

7 Which of the following is the most infectious:

A Giardia

B Salmonella

C Cryptosporidium

D E. coli

8 DBPs are the direct result of

A human waste being dumped into the water

B nitrate runoff from agricultural fertilizer

C byproduct formation from disinfectants

D oxidation of nitrites in sewage lines

9 Which chemical is commonly used to disinfect American water sources

A Chlorine

B Fluorine

C A combination of chloride & alcohol

D Ethyl-alcohol

10 All of the following are examples of bacterial contaminants EXCEPT:

A E. coli

B Salmonella

C Vibrio

D Giardia

11 CO32- is

A carbonate

B bicarbonate

C carbonic acid

D carbon dioxide

12 At an average ocean pH, which molecule is in the highest concentration

A carbonate

B bicarbonate

C carbonic acid

D carbon dioxide

13 What percentage of all of the planet's water is fresh water?

A 98%

B 70%

C 30%

D 2.5%

14 HCO3- is

A carbonate

B bicarbonate

C carbonic acid

D carbon dioxide

15 When considering the carbonate buffering system, all of the following would occur with an increase in atmospheric CO2, EXCEPT:

A The pH of aquatic systems would decrease

B The concentration of aquious carbon dioxide would increase

C The concentration of carbonate would increase

D Deposits of solid limestone would decrease

16 Which of the following is NOT a protist:

A Hydra B Amoeba

C Euglena D Paramecium

17 Microbes account for about ________% of all the biological mass on Earth.

A 98%

B 75%

C 50%

D 22%

18 Which of the following reactions is responsible for fixing nitrogen:

A NH4+ --> NO2

-

B NO2- --> NO3

-

C NO3- --> N2

D N2 --> NH4+

19 You leave a petri dish full of universal nutrients exposed to the air in the classroom for 24 hours, and then incubate the dish for 48 additional hours. When you type the bacteria found within dish, you discover that there is a very high concentration of two different types of bacteria. This is an example of:

A High species richness

B High species abundance

C Both high species abundance and species richness

D Both low species abundance and species richness

20 The difinitive host for Toxoplasmosis is:

A humans

B cats

C sheep

D cattle