NEET 2001 Biology question

What is true for cyano bacteria : -

(1)Oxygenic with nitrogenaseCorrect
(2)Oxygenic without nitrogenase
(3)Non oxygenic with nitrogenase
(4)Non oxygenic without nitrogenase

Answer: (1)

Solution

Cyanobacteria (blue-green algae) carry out plant-type photosynthesis with chlorophyll a and photosystems I and II, using water as electron donor and releasing oxygen, i.e. they are oxygenic. Many (e.g. Nostoc, Anabaena) fix atmospheric nitrogen using nitrogenase

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Question ID VK-088909