Related Questions

It takes 30 days to fill a laboratory dish with bacteria, If the size of the bacteria doubles each days, how long will it take for the bacteria to fill one-----half of the dish?
A 10 days
B 15 days
C 24 days
D 29 days
The number of bacteria in a colony was growing exponentially . At 1 pm yesterday the number of bacteria was 1000 and at 3 pm yesterday it was 4000. How many bacteria were there in the colony at 6 pm yesterday ?
A 32,000
B 80,000
C 60,072
D 7,683
Which one among the following water-borne diseases is not caused by a bacteria ?
A Cholera
B Typhoid
C Bacillary dysentery
D Hepatitis A
A certain population of bacteria doubles every 10 minutes. If the number of bacteria in the population initially was 104, what was the number of bacteria in the population 1 hour later?
A 2(104)
B 6(104)
C (26) (104)
D (106)(104)
Which of the following diseases is caused by bacteria?
A Downy mildew of grapes
B Anthracnose of beans
C Potato leaf roll
D Soft rot of carrot
Anything (a) ’that is’ useful and (b) ’spread so fast’ has to (c) ’be considered’ one of the (d) ’greatest invention’ of all time and a (e) ’matter to influence’ civilization. Here, which two underlined sections require changing to correct the sentence?
A a, c
B d, e
C b, d
D a, d
Refrigerating meats________the spread of bacteria.(Chose the word/phrase That best completes the sentence)
A Slows
B Slowing
C to slow
D is slowed
Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of
A Ozone and iodine
B Chlorine or its compounds
C Ultraviolet light for irradiation of water
D All of the above
Which one of the following diseases is caused by cadmium pollution?
A Minamata
B Itai-Itai
C Fluorosis
D Blue baby syndrome
The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria.
A Anaerobic
B Saphrophytic
C Aerobic
D Parasitic

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