MICROBES IN AQUATIC ENVIRONMENT QUIZ

Activated sludge undergoes

Tertiary treatment

Primary treatment

any of these

Secondary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

Hyphomycete fungi

both (a) and (b)

None of these

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

produce nonmotile tetaradiate conidia

TRUE ANSWER : ?
YOUR ANSWER : ?

Metabolism of dissolved organic material released by phytoplankton allows heterotrophic bacteria to become part of the particulate organic matter that is passed up the food web to be metabolized and released as mineral elements and CO2 at each transfer. This sentence describes the

Winogradsky column

Redfield ratio

microbial loop

Gibbs free energy

TRUE ANSWER : ?
YOUR ANSWER : ?

The Redfield ratio is an index of concentration of

carbon, phosphorous and sulfur

nitrogen, potassium and iron

carbon, hydrogen and oxygen

carbon, nitrogen and phosphorous

TRUE ANSWER : ?
YOUR ANSWER : ?

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

half

greater

approximately equal

lesser

TRUE ANSWER : ?
YOUR ANSWER : ?

Coliforms are used as indicator organisms because

both (a) and (b)

None of these

they are present wherever enteric pathogens are present

a testing procedure with great specificity is easy to perform

TRUE ANSWER : ?
YOUR ANSWER : ?

Trickling filter comes under

primary treatment

tertiary treatment

secondary treatment

none of these

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 : ?

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

MUG

Winogradsky

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

Both (a) and (b)

is the worlds smallest bacterium

is the worlds largest bacterium

TRUE ANSWER : ?
YOUR ANSWER : ?