MICROBES IN AQUATIC ENVIRONMENT QUIZ

Trickling filter comes under

none of these

tertiary treatment

secondary treatment

primary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

The Redfield ratio is an index of concentration of

carbon, hydrogen and oxygen

carbon, nitrogen and phosphorous

nitrogen, potassium and iron

carbon, phosphorous and sulfur

TRUE ANSWER : ?
YOUR ANSWER : ?

Activated sludge undergoes

Secondary treatment

any of these

Tertiary treatment

Primary 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.

half

greater

lesser

approximately equal

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.

MUG

Winogradsky

membrane filtration

most probable number

TRUE ANSWER : ?
YOUR ANSWER : ?

The sulfur pearl of Namibia, Thiomargarita namibiensis

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

is the worlds largest bacterium

is the worlds smallest bacterium

Both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

The amount of oxygen dissolved in hypolimnion water in the winter is __________ to/than the amount of oxygen dissolved in hypolimnion water in the summer

approximately equal to

half

lesser

greater

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 : ?

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

Clostridium

Rhodospirillum

Escherichia

Chlorobium

TRUE ANSWER : ?
YOUR ANSWER : ?

Hyphomycete fungi

both (a) and (b)

produce nonmotile tetaradiate conidia

None of these

grow in leaves and the infected leaves are the preferred food source for some aquatic insects

TRUE ANSWER : ?
YOUR ANSWER : ?