With refence to Cyanotoxins consider the following statements 1 They are produced by viruses 2 ...........

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With refence to Cyanotoxins, consider the following statements.

1.They are produced by viruses.

2.They remain undetected at the micro-level even by a bio-sensor.

3.Microcystins is a cyanotoxin.

4.They can be found in water bodies like oceans.

Select the correct answer using the codes below

2 and 3 only

1 and 4 only

3 and 4 only

1, 2 , 3 and 4

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Explanation:

They are toxins produced by bacteria called cyanobacteria (also known as blue-green algae).
Cyanobacteria are found almost everywhere, but particularly in lakes and in the ocean where, under certain conditions, they reproduce exponentially to form blooms.
Blooming cyanobacteria can produce cyanotoxins in such concentrations that they poison and even kill animals and humans.
Among cyanotoxins are some of the most powerful natural poisons known, including poisons which can cause rapid death by respiratory failure. The toxins include potent neurotoxins, hepatotoxins, cytotoxins, and endotoxins.
Bio-sensors for detection of toxins have been used for assessment of the water quality and a nano-particle based water treatment system to eliminate toxins and microorganisms in water.
Toxins which will be detected are cyanotoxin (microcystins, anatoxins) and micro-organisms (Enterococcus, Salmonella, Staphylococcus).