MICROBES IN AQUATIC ENVIRONMENT QUIZ

Which of the following species in water reveal the presence of fecal pollution of human or animal origin?

All of these

E.coli

Fecal Streptococci

Clostridium perfringens

TRUE ANSWER : ?
YOUR ANSWER : ?

Activated sludge undergoes

Secondary treatment

any of these

Tertiary treatment

Primary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

The sulfur pearl of Namibia, Thiomargarita namibiensis

Both (a) and (b)

is the worlds smallest bacterium

is the worlds largest bacterium

stores high concentrations of nitrate in a huge internal vacuole which takes up 98% of the organisms volume

TRUE ANSWER : ?
YOUR ANSWER : ?

is an environment like where microorganisms are functioning in an extremely thin film of water and where oxygen-containing air is close to them.

high oxygen diffusion environment; lakes

low oxygen diffusion environment; soils

high oxygen diffusion environment; soils

low oxygen diffusion environment; lakes

TRUE ANSWER : ?
YOUR ANSWER : ?

Removal of solids is generally considered as a

Secondary treatment

Primary treatment

None of these

Tertiary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

Loss of carbon through the microbial loop in oligotrophic environments is __________ to/than the loss of carbon through the microbial loop in copiotrophic environments.

greater

half

approximately equal

lesser

TRUE ANSWER : ?
YOUR ANSWER : ?

Members of all of the following genera of bacteria typically are found in a maturing Winogradsky column except

Clostridium

Chlorobium

Escherichia

Rhodospirillum

TRUE ANSWER : ?
YOUR ANSWER : ?

All of the following species are considered coliforms except

Salmonella typhi

Escherichia coli

Klebsiella pneumoniae

Enterobacter aerogenes

TRUE ANSWER : ?
YOUR ANSWER : ?

Coliforms are used as indicator organisms because

None of these

they are present wherever enteric pathogens are present

both (a) and (b)

a testing procedure with great specificity is easy to perform

TRUE ANSWER : ?
YOUR ANSWER : ?

The rate of flux of oxygen in air is __________ to/than the rate of flux of oxygen in water.

greater

approximately equal

lesser

half

TRUE ANSWER : ?
YOUR ANSWER : ?