Single Choice Type Question Read the following Statement carefully and choose the incorrect opti...
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Single Choice Type Question
Read the following Statement carefully and choose the incorrect option.
(1) Enzyme nitrogenase which is capable of nitrogen reduction is present exclusively in prokaryotes.
(2) Cyanobacteria such as Anabaena and Nostoc can fix atmospheric nitrogen only in a free-living state.
(3) The passive movement of ions into the free space of cells usually occurs through trans-membrane proteins that function as selective pores.
(4) Excess of manganese induces deficiencies of iron, magnesium and calcium.
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