MICROBES IN AQUATIC ENVIRONMENT QUIZ

Trickling filter comes under

none of these

primary treatment

secondary treatment

tertiary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

All of the following species are considered coliforms except

Escherichia coli

Klebsiella pneumoniae

Salmonella typhi

Enterobacter aerogenes

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.

approximately equal

half

lesser

greater

TRUE ANSWER : ?
YOUR ANSWER : ?

Coliforms are used as indicator organisms because

a testing procedure with great specificity is easy to perform

both (a) and (b)

None of these

they are present wherever enteric pathogens are present

TRUE ANSWER : ?
YOUR ANSWER : ?

Activated sludge undergoes

Tertiary treatment

any of these

Primary treatment

Secondary 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

produce nonmotile tetaradiate conidia

both (a) and (b)

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; lakes

high oxygen diffusion environment; soils

low oxygen diffusion environment; soils

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Rhodospirillum

Chlorobium

Escherichia

Clostridium

TRUE ANSWER : ?
YOUR ANSWER : ?

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

half

approximately equal

greater

lesser

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

Winogradsky

most probable number

MUG

TRUE ANSWER : ?
YOUR ANSWER : ?