MICROBES IN AQUATIC ENVIRONMENT QUIZ

All of the following species are considered coliforms except

Enterobacter aerogenes

Escherichia coli

Salmonella typhi

Klebsiella pneumoniae

TRUE ANSWER : ?
YOUR ANSWER : ?

The sulfur pearl of Namibia, Thiomargarita namibiensis

Both (a) and (b)

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

TRUE ANSWER : ?
YOUR ANSWER : ?

Trickling filter comes under

primary treatment

none of these

tertiary treatment

secondary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemical precipitation of phosphorus is

tertiary treatment

both (a) and (b)

primary treatment

secondary treatment

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; soils

low oxygen diffusion environment; lakes

high oxygen diffusion environment; lakes

low oxygen diffusion environment; soils

TRUE ANSWER : ?
YOUR ANSWER : ?

Hyphomycete fungi

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

both (a) and (b)

None of these

produce nonmotile tetaradiate conidia

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 : ?

Removal of solids is generally considered as a

Primary treatment

Tertiary treatment

None of these

Secondary treatment

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 : ?

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 : ?