MICROBES IN AQUATIC ENVIRONMENT QUIZ

Hyphomycete fungi

None of these

both (a) and (b)

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

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?

Fecal Streptococci

Clostridium perfringens

All of these

E.coli

TRUE ANSWER : ?
YOUR ANSWER : ?

Activated sludge undergoes

Primary treatment

Secondary treatment

Tertiary treatment

any of these

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

microbial loop

Gibbs free energy

Redfield ratio

Winogradsky column

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

MUG

most probable number

Winogradsky

TRUE ANSWER : ?
YOUR ANSWER : ?

Coliforms are used as indicator organisms because

None of these

a testing procedure with great specificity is easy to perform

both (a) and (b)

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.

greater

approximately equal

half

lesser

TRUE ANSWER : ?
YOUR ANSWER : ?

All of the following species are considered coliforms except

Salmonella typhi

Escherichia coli

Klebsiella pneumoniae

Enterobacter aerogenes

TRUE ANSWER : ?
YOUR ANSWER : ?

Chemical precipitation of phosphorus is

both (a) and (b)

tertiary treatment

secondary treatment

primary treatment

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Rhodospirillum

Escherichia

Chlorobium

Clostridium

TRUE ANSWER : ?
YOUR ANSWER : ?