MICROBES IN AQUATIC ENVIRONMENT QUIZ

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

half

lesser

approximately equal

greater

TRUE ANSWER : ?
YOUR ANSWER : ?

The sulfur pearl of Namibia, Thiomargarita namibiensis

is the worlds largest bacterium

is the worlds smallest bacterium

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

Both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

Removal of solids is generally considered as a

None of these

Secondary treatment

Primary treatment

Tertiary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

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

lesser

approximately equal

greater

half

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Fecal Streptococci

Clostridium perfringens

All of these

E.coli

TRUE ANSWER : ?
YOUR ANSWER : ?

Trickling filter comes under

tertiary treatment

none of these

primary treatment

secondary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

All of the following species are considered coliforms except

Salmonella typhi

Enterobacter aerogenes

Escherichia coli

Klebsiella pneumoniae

TRUE ANSWER : ?
YOUR ANSWER : ?

Because it can be used with a variety of media and allow a resuscitation step the __________ technique has become the common and often preferred method of evaluating the microbiological characteristics of water.

membrane filtration

most probable number

Winogradsky

MUG

TRUE ANSWER : ?
YOUR ANSWER : ?

Activated sludge undergoes

Tertiary treatment

Primary treatment

Secondary treatment

any of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemical precipitation of phosphorus is

secondary treatment

tertiary treatment

both (a) and (b)

primary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

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