MICROBES IN AQUATIC ENVIRONMENT QUIZ

Hyphomycete fungi

produce nonmotile tetaradiate conidia

None of these

both (a) and (b)

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

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.

most probable number

MUG

Winogradsky

membrane filtration

TRUE ANSWER : ?
YOUR ANSWER : ?

The sulfur pearl of Namibia, Thiomargarita namibiensis

is the worlds smallest bacterium

is the worlds largest bacterium

Both (a) and (b)

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

TRUE ANSWER : ?
YOUR ANSWER : ?

Coliforms are used as indicator organisms because

both (a) and (b)

None of these

a testing procedure with great specificity is easy to perform

they are present wherever enteric pathogens are present

TRUE ANSWER : ?
YOUR ANSWER : ?

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

approximately equal

half

lesser

greater

TRUE ANSWER : ?
YOUR ANSWER : ?

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 : ?

All of the following species are considered coliforms except

Escherichia coli

Salmonella typhi

Enterobacter aerogenes

Klebsiella pneumoniae

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 : ?

Trickling filter comes under

secondary treatment

primary treatment

none of these

tertiary treatment

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

half

greater

approximately equal to

lesser

TRUE ANSWER : ?
YOUR ANSWER : ?