MICROBES IN AQUATIC ENVIRONMENT QUIZ

The Redfield ratio is an index of concentration of

nitrogen, potassium and iron

carbon, phosphorous and sulfur

carbon, hydrogen and oxygen

carbon, nitrogen and phosphorous

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.

Winogradsky

most probable number

membrane filtration

MUG

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

greater

half

approximately equal to

lesser

TRUE ANSWER : ?
YOUR ANSWER : ?

The sulfur pearl of Namibia, Thiomargarita namibiensis

is the worlds largest bacterium

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

Both (a) and (b)

is the worlds smallest bacterium

TRUE ANSWER : ?
YOUR ANSWER : ?

Removal of solids is generally considered as a

Primary treatment

Secondary treatment

Tertiary treatment

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Activated sludge undergoes

Secondary treatment

Primary treatment

any of these

Tertiary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

Hyphomycete fungi

None of these

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

both (a) and (b)

produce nonmotile tetaradiate conidia

TRUE ANSWER : ?
YOUR ANSWER : ?

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

E.coli

Clostridium perfringens

Fecal Streptococci

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

All of the following species are considered coliforms except

Klebsiella pneumoniae

Enterobacter aerogenes

Salmonella typhi

Escherichia coli

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Rhodospirillum

Clostridium

Escherichia

Chlorobium

TRUE ANSWER : ?
YOUR ANSWER : ?