GROWTH AND NUTRITION OF BACTERIA QUIZ

Bacteria and fungi multiply best

above 38°C

between 16-38°C

below 16°C

none of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A synergistic effect is observed when

microbial alteration of pH, aw, Eh favours the growth of another

one organism produces a growth factor utilized by another

one organism removes an inhibitory substance for another

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The reproduction by budding occur in

Hyphomicrobium vulgare

Both (a) and (b)

Bacillus subtilis

Rhodopseudomonas acidophila

TRUE ANSWER : ?
YOUR ANSWER : ?

Antimicrobial constituents for the microbial growth in foods are

intrinsic factor

extrinsic factor

none of these

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

The growth is normally expressed as __________ in turbidimetric measurement

cells per ml

cfu/ml

optical density

mg N2 /ml

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is used to grow bacterial cultures continuously?

Coulter Counter

Petroff-Hausser chamber

Chemostat

Hemostat

TRUE ANSWER : ?
YOUR ANSWER : ?

Generation time of Escherichia coli is

20 minutes

20 days

200 hours

20 hours

TRUE ANSWER : ?
YOUR ANSWER : ?

The straightforward method of binary fission explains how bacteria

reproduce

evolve

move

grow in nutrient agar

TRUE ANSWER : ?
YOUR ANSWER : ?

The cell reproduction in bacteria may occur by

binary fission

fragmentation

budding

all of these

TRUE ANSWER : ?
YOUR ANSWER : ?

An organism is completely dependent on atmospheric O2 for growth. This organism is

acidophile

osmotolerant

facultative anaerobe

obligate aerobe

TRUE ANSWER : ?
YOUR ANSWER : ?