Related Questions

Which of the following is a waterborne disease?
A Smallpox
B Malaria
C Cholera
D Tuberculosis
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
Which one of the following diseases is caused by bacteria and spread through faecal matter by houseflies ?
A Pertussis
B Typhoid
C Diphtheria
D Chickenpox
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
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
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
The population of a bacteria culture doubles every 2 minutes. Approximately how many minutes with it take for the population to grow from 1,000 to 500,000 bacteria?
A 10
B 12
C 14
D 18

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